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OuShangMei Technology Co.,Ltd

Shenzhen Oushangmei Technology Co., Ltd. is a professional manufacturer and developer of: AC/DC power adapters, LED power supplies, waterproof power supplies, POE injectors, POE power supplies and phone chargers etc. Our factory has advanced production and testing equipment, a first-class sales team and an independent high-level R&D team. With more than 11 years of experience in China, our products have passed UL/cUL, 3C, cETL 1310, CE, FCC, KC, SAA, C/tick, CB, TUV/GS, ROHS and other certifications.

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Honorary Qualification & Safety Certificates

FCC Certification and Power Supply If you want to produce and export power adapters to the United States, you need to comply with the requirements of the Federal Communications Commission (FCC), which is the authority that regulates the electromagnetic compatibility of electronic products in the US market. FCC certification is a mandatory certification for electronic products that can emit radio frequency energy, such as wireless devices, radio transmitters, signal amplifiers and devices using cellular technology. In this article, we will introduce some basic knowledge and requirements of FCC certification and power adapter, and help you understand how to apply for FCC certification for your power adapter products. Types of FCC certification According to the different levels of risk and interference of electronic products, FCC divides them into three categories: intentional radiators, unintentional radiators and incidental radiators. Intentional radiators are devices that intentionally generate and emit radio frequency energy by radiation or induction, such as wireless devices, radio transmitters, signal amplifiers and devices using cellular technology. They need to obtain FCC Certification (formerly known as FCC ID) before entering the US market. Unintentional radiators are devices that operate at a frequency higher than 9 kHz and use digital techniques, but do not intentionally generate or emit radio frequency energy, such as personal computers, printers, keyboards, power adapters, etc. They need to obtain FCC Supplier’s Declaration of Conformity (SDoC) before entering the US market. Incidental radiators are devices that generate radio frequency energy during their operation but are not intended to emit it, such as electric motors, switches, etc. They do not need to obtain any FCC certification or declaration before entering the US market. How to apply for FCC certification for power adapter If your power adapter belongs to the category of unintentional radiator, you need to apply for FCC SDoC for it. The main steps are as follows: Choose a qualified testing laboratory that can perform FCC testing according to the applicable standards and regulations. You can find a list of accredited testing laboratories on the FCC website. Submit your product information and samples to the testing laboratory for testing. The testing laboratory will issue a test report after completing the testing. Prepare a declaration of conformity that contains the following information: product identification and model number; name and address of responsible party; statement of compliance with FCC rules; reference to test report; date and place of issue; signature of authorized person. Attach a label on your product that contains the following information: product identification and model number; statement of compliance with FCC rules; name or logo of responsible party. The label should be visible and durable. Keep a copy of the test report and declaration of conformity for future reference. You do not need to submit them to FCC unless requested. Conclusion This article briefly introduced what is FCC certification, why we need it for power adapter, what are the types of FCC certification for different products, and how to apply for FCC SDoC for power adapter.

Global Safety Certification of Power Adapters Power adapters are devices that convert alternating current (AC) input into low-voltage direct current (DC) input, widely used in industrial and commercial equipment. The safety of power adapters is crucial for preventing fire, electric shock and injury. Therefore, power adapters must comply with relevant safety standards in order to be sold in different markets. These safety standards are established and administered by national or international agencies, with various government-recognized testing laboratories able to provide certification. This article will introduce the global safety certification of power adapters, including the certification agencies and standards of regions such as the United States, Canada, Europe, Japan, Korea, Russia, India, etc. The United States and Canada The United States and Canada have similar safety standards and regulations, so power adapters need to obtain corresponding certifications to enter these two markets. The most common certification agency is UL (Underwriters Laboratories), which is a global product safety testing and certification laboratory, with an extensive database of electrical product safety standards. The UL mark indicates that the power adapter meets the safety requirements of the United States and Canada . In addition to UL, there are other certification agencies that can provide certification services for the US and Canadian markets, such as CSA (Canadian Standards Association), ETL (Electrical Testing Laboratories), etc. Europe Europe is an economic region composed of multiple countries, so power adapters need to meet the basic requirements of the European Union in order to be sold in the European market. The most common legal mark is CE (Conformité Européenne), which indicates that the product meets the basic requirements of the European Union, including safety, health and environmental aspects. In addition to CE, there are some international or regional certification agencies that can provide certification services for the European market, such as TüV (Technischer überwachungsverein), VDE (Verband der Elektrotechnik), BSI (British Standards Institution), etc. In addition, in Europe there are other marks applicable in the Nordic countries and other central and eastern European countries such as Denmark, Switzerland, Hungary, Ukraine and Belarus, such as D-Mark, S-Mark, EAC, etc. CE Certification and Power Adapter If you want to produce and export power adapters to the European Economic Area (EEA), you need to comply with the CE certification requirements of these markets, which can affect the performance and safety of your products and other devices. CE certification is a regulatory mark that indicates compliance with the applicable EU directives and regulations for health, safety and environmental protection. It works as a trade passport that allows your product to be sold freely in any part of the EEA, regardless of its country of origin. In this article, we will introduce some basic knowledge and benefits of CE certification and power adapter, and help you understand how to apply for CE certification for your power adapter products. What is CE certification CE certification stands for Conformité Européenne (French for European conformity). It is a mark that consists of the CE logo and, if applicable, the four-digit identification number of the notified body involved in the conformity assessment procedure. CE certification is based on self-declaration by the manufacturer or importer, who is responsible for ensuring that their product meets the relevant EU directives and regulations. The manufacturer or importer must also prepare a declaration of conformity (DoC) and a technical file that contain the product information, test results and references to the applicable standards. The CE mark must be visible and durable on the product or its packaging. The mark indicates that the product complies with the applicable EU directives and regulations and also allows the authorities to trace the product back to the manufacturer or importer in case of any compliance issues. How to apply for CE certification for power adapter If your power adapter meets the applicable EU directives and regulations for health, safety and environmental protection, you can apply for CE certification for it. The main steps are as follows: Choose a qualified testing laboratory that can perform testing according to the applicable standards and regulations. You can find a list of accredited testing laboratories on the EU website. Submit your product information and samples to the testing laboratory for testing. The testing laboratory will issue a test report after completing the testing. Prepare a declaration of conformity (DoC) that contains the following information: product identification and model number; name and address of manufacturer or importer; reference to test report; date and place of issue; signature of authorized person. Prepare a technical file that contains the following information: product description and specifications; design notes and drawings; bill of materials; test results and certificates; risk assessment and analysis; user manual and instructions. Attach a label on your product or its packaging that contains the CE mark and any other relevant information. The label should be visible and durable. Benefits of CE certification for power adapter CE certification can help you access the EEA markets with a single mark. It can save you time and money by avoiding repetitive testing and certification for the same product in different markets. CE certification can also help you demonstrate your product quality and safety to your customers and stakeholders. It can enhance your brand reputation and competitiveness in these markets. Japan Japan has its own safety standards and regulations, so power adapters need to obtain corresponding certifications to enter the Japanese market. The most common certification agency is PSE (Product Safety Electrical Appliance & Material), which is a mandatory certification system designated by the Japanese Ministry of Economy, Trade and Industry, aiming to ensure that electrical products used in Japan do not cause fire or electric shock accidents. The PSE mark indicates that the power adapter meets the safety requirements of Japan. Korea Korea also has its own safety standards and regulations, so power adapters need to obtain corresponding certifications to enter the Korean market. The most common certification agency is KC (Korea Certification), which is a mandatory certification system designated by the Korean Ministry of Industry, Trade and Resources, aiming to ensure that electrical products used in Korea do not cause fire or electric shock accidents. The KC mark indicates that the power adapter meets the safety requirements of Korea. Russia Russia also has its own safety standards and regulations, so power adapters need to obtain corresponding certifications to enter the Russian market. The most common certification agency is EAC (Eurasian Conformity), which is a unified certification system of the customs union composed of Russia, Belarus, Kazakhstan, Armenia and Kyrgyzstan, aiming to ensure that electrical products used in these countries meet the requirements of safety, quality and environmental protection. The EAC mark indicates that the power adapter meets the safety requirements of the customs union. India India also has its own safety standards and regulations, so power adapters need to obtain corresponding certifications to enter the Indian market. The most common certification agency is BIS (Bureau of Indian Standards), which is a mandatory certification system designated by the central government of India, aiming to ensure that electrical products used in India meet the requirements of safety, quality and environmental protection. The BIS mark indicates that the power adapter meets the safety requirements of India. Conclusion The global safety certification of power adapters is a multi-faceted issue that requires choosing the appropriate certification agency and standard according to different markets and requirements. Power adapters not only need to ensure safety, but also consider environmental aspects to meet the expectations of consumers and society. By obtaining different regional safety certifications, power adapters can improve their market competitiveness and credibility, thereby promoting their sales and development.
Introduction of Oushangmei Power Supply Technology Co., Ltd. Power adapter is a device that converts alternating current into low-voltage direct current. It is an essential accessory for various small portable electronic devices and electronic appliances. With the progress of science and technology and the development of society, the types and quantities of electronic products are increasing, and the demand for power adapters is also increasing. According to the report of market research agency, it is expected that the global power adapter market size will reach 25 billion US dollars in 2020 and 35 billion US dollars in 2025,with a compound annual growth rate of 6.8%. The main driving factors of power adapter market include the following points: The popularity and replacement of electronic products. With the popularity of mobile devices such as smartphones, tablets, laptops, etc., and the development of new technologies such as 5G, Internet of Things, artificial intelligence, etc., the demand for power adapters also increases. At the same time, as consumers’ requirements for performance, function and appearance increase, electronic products also need to be constantly updated and replaced, which drives the update and replacement of power adapters. The technological innovation and standard unification of power adapters. In order to meet the consumers’ demand for charging speed, compatibility and safety, as well as energy saving and environmental protection requirements, power adapters are also constantly undergoing technological innovation and standard unification. For example, using fast charging technology, wireless charging technology, USB-C interface, etc., to improve the charging efficiency and convenience; using high-frequency switching technology, synchronous rectification technology, power factor correction technology, etc., to improve the efficiency and stability of power adapters; using over-voltage protection, over-current protection, short-circuit protection, etc., to improve the safety of power adapters. Innovative design Support bidirectional charging function. typc charger can automatically switch input and output modes according to the device’s needs, achieving bidirectional charging. It can charge devices as well as provide power for other devices, convenient for users to use. Support multiple protocol compatibility function. typc charger supports USB PD, QC, AFC and other fast charging protocols. It can be compatible with different brands and models of devices, without worrying about the mismatch between charger and device. Support magnetic adsorption function. typc charger uses magnetic adsorption design. It can easily connect USB-C interface and device, without worrying about plug direction and poor contact problems, improving charging efficiency and convenience. Environmental concept Support energy saving and emission reduction function. typc charger uses high-efficiency conversion chip and components, effectively reducing the loss and heat of power supply, saving energy consumption, and meeting the EU energy efficiency standards. Support environmental material function. typc charger uses lead-free, mercury-free Received message. Support environmental material function. typc charger uses lead-free, mercury-free, halogen-free and other environmental materials, meeting RoHS and other environmental standards, reducing the pollution to the environment. Support recycling function. typc charger uses detachable and recyclable design, convenient for users to replace and repair, extending the service life and safety. Oushangmei Technology Power Co., Ltd.'s typc charger products have passed CCC, CE, UL, FCC and other domestic and foreign certifications, quality is guaranteed and trustworthy. If you need to buy or consult typc charger products, please contact us, we will provide you with quality products and services. Shenzhen Oushangmei Technology Co., Ltd. is a professional manufacturer and R&D company that specializes in producing switch power supplies, power adapters, LED power supplies, waterproof power supplies, and other related products. Our company possesses advanced production equipment and testing facilities, a first-class sales team, as well as an independent and high-level R&D team. In the field of power supplies, we have established a good service system and product sales channel by borrowing from the advanced technology of peers in the industry and leveraging the rich experience of our engineers. Our products have passed various certifications such as CCC, cETL 1310, CE, UL/Cul, FCC, KC, SAA, C/tick, CB, TUV/GS, and ROHS.

OUSM Technology Power Supply: A High-Quality and Reliable Option Power supply adapters are an essential component of many electronic devices, from laptops and smartphones to gaming consoles and routers. However, not all power supply adapters are created equal, and choosing the right one can make a significant difference in performance, stability, and safety. In this article, we will explore OUSM Technology power supply adapters and highlight their performance and advantages, using examples and user reviews. OUSM Technology is a leading manufacturer of power supply adapters, offering a wide range of models and specifications to meet the needs of different users. Their products are known for their high efficiency, stability, and safety, making them a popular choice among consumers. # Introduction to Shenzhen OUSM Power Technology Co., Ltd. The company's main products are wall-mounted power adapters and desktop power adapters. They have different specifications and models to meet the needs of different customers. The company's products have the following features: - Level 6 energy efficiency: Comply with the latest energy efficiency standards, save energy and protect the environment, and reduce operating costs. - Adapt to the world: It can adapt to 100-240V AC input voltage and is suitable for use all over the world. - Military quality: Use high-quality electronic components and strict process procedures to ensure the durability and reliability of the product. - Beautiful appearance: The shell is made of fire-resistant material, with a simple and elegant design that conforms to ergonomic principles. ## Service Advantages The company's mission is to provide quality products to the market, customer satisfaction as the goal, innovation as the driving force, and continuously improve its core competitiveness. The company has the following service advantages: - Professional R&D team: The company has a five-person professional R&D team, covering circuit design, safety assessment, appearance design, structure design, technical management and other talents. It can plan and design according to customer's functional requirements and provide customers with tailor-made products with reasonable configuration and high cost performance. - Advanced production equipment: The company has a complete production line and testing equipment. The production workshop is equipped with plug-in lines, wave soldering, power comprehensive test lines, fully automatic aging rooms, laser engraving machines, high-performance power analyzers, oscilloscopes and other equipment. Create a high-quality power adapter manufacturer. - Perfect after-sales service: The company provides a one-year warranty period and lifetime maintenance service. For any quality problems or usage problems, we will respond and solve them in time to make customers worry-free. Oushangmei Technology is a professional company that produces and sells high-quality power adapters. Its products cover various specifications and power levels of AC output and DC output power adapters, which can meet the needs of different devices and occasions. Oushangmei Technology power adapters have the following advantages: Energy-efficient: Oushangmei Technology power adapters use advanced switching power supply technology, which can effectively reduce power consumption and heat generation, improve conversion efficiency, and meet the national energy-saving standards. Stable and reliable: Oushangmei Technology power adapters use high-quality transformers, capacitors, control chips and other components, which have been strictly tested and inspected to ensure the stability of output voltage and current, and prevent overvoltage, overcurrent, short circuit and other faults. Safe and environmentally friendly: Oushangmei Technology power adapters have passed the national safety certification, comply with CE, FCC and other international standards, have good anti-interference and lightning protection capabilities, and use lead-free, mercury-free and other environmentally friendly materials to reduce environmental pollution. Personalized customization: Oushangmei Technology power adapters provide customers with a variety of interface and plug options, as well as different colors and shapes of design, to meet the personalized needs of customers. To demonstrate the performance and advantages of Oushangmei Technology power adapters, we can refer to the following cases or user reviews: Case 1: A company uses Oushangmei Technology power adapters to power its security cameras, and finds that compared with other brands of power adapters, Oushangmei Technology power adapters can better ensure the clarity and stability of the cameras, without any screen jitter or splash screen phenomena, while also saving some electricity costs. Case 2: A school uses Oushangmei Technology power adapters to power its multimedia classroom projectors, speakers and other equipment, and finds that Oushangmei Technology power adapters can effectively eliminate the interference between devices, improve the quality and effect of audio and video, and also extend the service life of equipment. One of the advantages of OUSM Technology power supply adapters is their high efficiency. They are designed to convert the AC power from the wall outlet to the DC power required by the electronic device with minimal energy loss, resulting in lower electricity bills and longer battery life. Moreover, OUSM Technology power supply adapters are engineered to meet strict energy efficiency standards, such as Energy Star and DoE Level VI, ensuring that they consume the least amount of energy possible. Another advantage of OUSM Technology power supply adapters is their stability. They are built with high-quality components and advanced technology, such as overvoltage protection, short-circuit protection, and electromagnetic interference (EMI) filtering, to provide a stable and consistent output voltage and current. This stability is crucial for the proper functioning of electronic devices, as any fluctuations or spikes in power can cause damage or malfunctions. Finally, OUSM Technology power supply adapters are also known for their safety. They undergo rigorous testing and certification processes to ensure that they comply with international safety standards, such as UL, CE, FCC, and RoHS. They are designed with multiple safety features, such as overcurrent protection, overtemperature protection, and overcharge protection, to prevent any potential hazards or accidents. User reviews of OUSM Technology power supply adapters are generally positive, with many users praising their performance and durability. For example, one user on Amazon commented, "I have been using OUSM Technology power supply adapters for a few years now, and they have never let me down. They are reliable, efficient, and safe, and I appreciate the peace of mind that comes with using them." Another user on Reddit wrote, "I used to buy other brands of power supply adapters, but I found that they often failed. I decided to try OUSM Technology power supply adapters because I heard they were very durable. I have been using them for over a year now, and I haven't had any issues. Their durability is impressive, and I highly recommend them." In conclusion, OUSM Technology power supply adapters are a high-quality and reliable option for anyone looking for a power supply adapter. Their efficiency, stability, and safety make them stand out in the market, and user reviews attest to their performance and durability. Whether you are a gamer, a programmer, or a regular user, you can find a suitable power supply adapter from OUSM Technology.
Safety Certification of Power Adapters Power adapters are devices that convert alternating current (AC) input into low-voltage direct current (DC) input, widely used in industrial and commercial equipment. The safety of power adapters is crucial for preventing fire, electric shock and injury. Therefore, power adapters must comply with relevant safety standards in order to be sold in different markets. These safety standards are established and administered by national or international agencies, with various government-recognized testing laboratories able to provide certification. This article will introduce the safety certification of power adapters, including well-known global certifications and environmental certifications. Well-known Global Certifications Different countries or regions have different safety standards and regulations, so power adapters need to obtain corresponding certifications to enter the local market. Some international certification agencies can provide certification services for multiple markets, such as UL, TüV, CE, etc. These certification agencies have their own safety marks, which can be affixed to the power adapters to indicate their compliance with relevant standards. Here are some common well-known global certifications and their meanings: UL: Underwriters Laboratories, is a global product safety testing and certification laboratory, with an extensive database of electrical product safety standards. The UL mark indicates that the power adapter meets the safety requirements of the United States and Canada . TüV: Technischer überwachungsverein, is a German technical inspection association that provides various product testing and certification services. The TüV mark indicates that the power adapter meets the safety requirements of Europe or other regions. CE: Conformité Européenne, is a legal mark of the European Union, indicating that the product meets the basic requirements of the European Union, including safety, health and environmental aspects. Environmental Certifications In addition to safety certifications, power adapters also need to consider environmental requirements, such as energy saving, emission reduction and recyclability. Some international or regional environmental standards and programs can help power adapters improve their environmental performance and obtain corresponding certifications or marks. Here are some common environmental certifications and their meanings: RoHS: Restriction of Hazardous Substances, is a legal directive of the European Union that restricts the use of certain hazardous substances in electronic devices, such as lead, mercury, cadmium, etc. WEEE: Waste Electrical and Electronic Equipment, is a legal directive of the European Union that requires manufacturers to be responsible for their electronic devices they produce and recycle or dispose of them at the end of their useful life. Energy Star: is an energy-saving program jointly implemented by the United States and Canada, aiming to help consumers choose high-efficiency and low-energy products. The Energy Star mark indicates that the power adapter meets a certain energy-saving standard. CB Certification and Power Adapter If you want to produce and export power adapters to different countries, you may need to comply with various safety standards and certification requirements of different markets, which can be time-consuming and costly. CB certification is a solution that can help you simplify the process and save resources. It is a global system for mutual recognition of test results and certificates relating to the safety of electrical and electronic products based on IEC standards. In this article, we will introduce some basic knowledge and benefits of CB certification and power adapter, and help you understand how to apply for CB certification for your power adapter products. What is CB certification CB certification stands for Certification Body certification. It is a system operated by IECEE, the IEC System of Conformity Assessment Schemes for Electrotechnical Equipment and Components. The CB system allows participating countries and certification organizations to accept test reports and certificates issued by each other, thus reducing the need for duplicate testing and certification for the same product in different markets. More than 50 countries currently participate in the CB system, including major markets such as China, Japan, South Korea, Singapore, India, Australia, USA, Canada, Mexico, Brazil, Argentina, UK, France, Germany, Italy, Spain, Sweden, Norway, Finland, Denmark, Netherlands, Belgium, Switzerland, Austria, Poland, Czech Republic, Hungary, Turkey, Russia, South Africa and Saudi Arabia. How to apply for CB certification for power adapter If your power adapter meets the applicable IEC standards for safety and performance, you can apply for CB certification for it. The main steps are as follows: Choose a qualified testing laboratory that can perform CB testing according to the applicable standards and regulations. You can find a list of accredited testing laboratories on the IECEE website. Submit your product information and samples to the testing laboratory for testing. The testing laboratory will issue a CB test report and a CB certificate after completing the testing. Present your CB test report and certificate to other participating countries or certification organizations to obtain their national or regional certifications or marks for your product. You may need to provide some additional information or documents depending on their specific requirements. Attach a label on your product that contains the relevant information and marks for each market that you want to enter. Benefits of CB certification for power adapter CB certification can help you access global markets with a single test report and certificate. It can save you time and money by avoiding repetitive testing and certification for the same product in different markets. CB certification can also help you demonstrate your product quality and safety to your customers and stakeholders. It can enhance your brand reputation and competitiveness in the global market. Conclusion The safety certification of power adapters is a multi-faceted issue that requires choosing the appropriate certification agency and standard according to different markets and requirements. Power adapters not only need to ensure safety, but also consider environmental aspects to meet the expectations of consumers and society. By obtaining well-known global certifications and environmental certifications, power adapters can improve their market competitiveness and credibility, thereby promoting their sales and development.

The power adapters produced by Oushangmei Technology Power Supply Co., Ltd. have multiple protection functions, such as over-voltage protection, over-current protection, overload protection, short circuit protection, etc., to ensure the safety and stability of electrical equipment. The company's independently developed products have multiple patented technologies and have passed certifications such as ISO9001 and ISO14001, ensuring quality. The company has a modern production factory and efficient production equipment to meet the needs of various customers. Power adapters are one of the essential accessories for modern electronic devices. Oushangmei Technology Power Supply Co., Ltd. has always put product quality and user experience first, adhering to the business philosophy of "winning the market with quality and winning customers with service," and continuously improving product quality and service quality. The company will provide customers with better products and services with a more professional and lean attitude, helping customers achieve greater success in their respective fields. In recent years, with the rapid development of electronic products, the demand for power adapters has been increasing. Oushangmei Technology Power Supply Co., Ltd. has been actively responding to market demand and continuously innovating to provide customers with more diverse and high-quality products. The company has established long-term partnerships with many well-known domestic and foreign enterprises, and its products are exported to many countries and regions. In addition to product quality and innovation, Oushangmei Technology Power Supply Co., Ltd. also attaches great importance to environmental protection and social responsibility. The company has established a sound environmental management system and a quality management system, strictly controls the environmental impact of production activities, and actively carries out social welfare activities, contributing to the sustainable development of society. SAA Certification and Power Adapter If you want to produce and export power adapters to Australia or New Zealand, you need to comply with the SAA certification requirements of these markets, which can affect the performance and safety of your products and other devices. SAA certification is a regulatory mark that indicates compliance with the applicable Australian standards for electrical safety. It works as a trade passport that allows your product to be sold freely in Australia and New Zealand, regardless of its country of origin. What is SAA certification SAA certification stands for Standards Association of Australia certification. It is a mark that consists of the SAA logo and a certificate number. It is also known as RCM (Regulatory Compliance Mark) certification, which is a unified mark for electrical safety and electromagnetic compatibility (EMC) compliance in Australia and New Zealand. SAA certification is based on third-party testing and certification by an accredited body, such as SAA Approvals, who is responsible for ensuring that the product meets the relevant Australian standards for electrical safety. The accredited body must also register the product with the Electrical Regulatory Authorities Council (ERAC) database. The SAA mark must be visible and durable on the product or its packaging. The mark indicates that the product complies with the applicable Australian standards for electrical safety and also allows the authorities to trace the product back to the manufacturer or importer in case of any compliance issues. How to apply for SAA certification for power adapter If your power adapter meets the applicable Australian standards for electrical safety, you can apply for SAA certification for it. The main steps are as follows: Choose a qualified testing laboratory that can perform testing according to the applicable standards and regulations. You can find a list of accredited testing laboratories on the SAA Approvals website. Submit your product information and samples to the testing laboratory for testing. The testing laboratory will issue a test report after completing the testing. Choose an accredited body that can issue SAA certificates according to the test report. You can find a list of accredited bodies on the ERAC website. Submit your test report and other required documents to the accredited body for certification. The accredited body will issue a SAA certificate and a certificate number after verifying the compliance of your product. Register your product with the ERAC database using your certificate number and other product information. You need to pay a registration fee for each product family. Attach a label on your product or its packaging that contains the SAA mark and your certificate number. The label should be visible and durable. Benefits of SAA certification for power adapter SAA certification can help you access the Australian and New Zealand markets with a single mark. It can save you time and money by avoiding repetitive testing and certification for the same product in different markets. SAA certification can also help you demonstrate your product quality and safety to your customers and stakeholders. It can enhance your brand reputation and competitiveness in these markets. Oushangmei Technology Co., Ltd. is a power adapter manufacturer that can provide solutions for all kinds of power needs. Whether you need a power adapter for your laptop, phone, tablet, or other devices, Oushangmei Technology can offer you high-quality products with advanced technology and excellent service. Power adapters are devices that convert the alternating current (AC) from the wall outlet to the direct current (DC) that your device needs. There are different types of power adapters, such as AC output, DC output, regulated, unregulated, low power, medium power, high power, and so on. Oushangmei Technology can produce various types of power adapters according to your specifications and requirements. In conclusion, as a professional power adapter manufacturer, Oushangmei Technology Power Supply Co., Ltd. has always been committed to providing customers with high-quality and reliable products and services, adhering to the business philosophy of quality first and customer-oriented, and continuously improving product quality and service quality to meet the ever-changing market demand. The company will continue to work hard to become a world-renowned power adapter brand and contribute to the development of the electronic industry.
C-Tick and Power Adapter If you want to produce and export power adapters to Australia or New Zealand, you may need to comply with the electromagnetic compatibility (EMC) standards and requirements of these markets, which can affect the performance and safety of your products and other devices. C-Tick is a certification mark that indicates compliance with the applicable EMC standards and also provides a traceable link between the product and the supplier. It was established by the Australian Communications and Media Authority (ACMA) and also recognized by the New Zealand Radio Spectrum Management (RSM). In this article, we will introduce some basic knowledge and benefits of C-Tick certification and power adapter, and help you understand how to apply for C-Tick certification for your power adapter products. What is C-Tick certification C-Tick certification is a voluntary certification scheme that allows suppliers to demonstrate compliance with the EMC standards and regulations of Australia and New Zealand. It covers a wide range of electronic products that can generate or be affected by electromagnetic interference, such as power adapters, computers, printers, radios, televisions, etc. C-Tick certification is based on self-declaration by the supplier, who is responsible for ensuring that their product meets the relevant EMC standards and requirements. The supplier must also register with the ACMA or RSM as a responsible supplier before applying the C-Tick mark on their product. The C-Tick mark consists of a stylized letter “C” within a tick symbol, followed by the supplier’s identification code. The mark must be visible and durable on the product or its packaging. The mark indicates that the product complies with the applicable EMC standards and also allows the authorities to trace the product back to the supplier in case of any compliance issues. How to apply for C-Tick certification for power adapter If your power adapter meets the applicable EMC standards for Australia and New Zealand, you can apply for C-Tick certification for it. The main steps are as follows: Choose a qualified testing laboratory that can perform EMC testing according to the applicable standards and regulations. You can find a list of accredited testing laboratories on the ACMA or RSM websites. Submit your product information and samples to the testing laboratory for testing. The testing laboratory will issue a test report after completing the testing. Prepare a declaration of conformity that contains the following information: product identification and model number; name and address of responsible supplier; reference to test report; date and place of issue; signature of authorized person. Register with the ACMA or RSM as a responsible supplier and obtain a supplier identification code. You need to provide some basic information about your business and products, as well as pay a registration fee. Attach a label on your product or its packaging that contains the C-Tick mark and your supplier identification code. The label should be visible and durable. Benefits of C-Tick certification for power adapter C-Tick certification can help you access the Australian and New Zealand markets with a single mark. It can save you time and money by avoiding repetitive testing and certification for the same product in different markets. C-Tick certification can also help you demonstrate your product quality and safety to your customers and stakeholders. It can enhance your brand reputation and competitiveness in these markets. Power adapters are an indispensable part of modern electronic products, providing stable power to various devices. On the other hand, Oushangmei Technology is a company that specializes in the research, development, production, and sales of power adapters, with years of industry experience and an excellent technical team. Its market competitiveness is highly regarded. Firstly, Oushangmei Technology has certain advantages in technology research and development. The company has a research and development team composed of engineers and technical experts who continuously explore and introduce new technologies, making the company's power adapters make significant progress in performance and functionality. At the same time, the company focuses on technological innovation, constantly developing new products to meet the ever-changing demands of the market. Secondly, Oushangmei Technology places great emphasis on quality management, which is also a significant source of the company's competitiveness. The company strictly controls every aspect of the production process to ensure that each power adapter meets international standards and customer quality requirements. By introducing a quality management system and implementing comprehensive quality management, the company continually improves product quality and reliability, winning the trust and support of its customers. Finally, Oushangmei Technology has a certain advantage in its service system. The company adheres to the "customer first" philosophy, continuously improving and optimizing after-sales services, providing customers with high-quality services and technical support. The company has a professional after-sales service team that can respond to customer needs promptly, providing comprehensive technical support and solutions. Overall, Oushangmei Technology has certain competitiveness and advantages in the market, mainly reflected in technology research and development, quality management, and service system. As the market continues to change and customer demands continue to increase, the company will continue to strengthen its competitiveness, continually improving product quality and performance, and providing better power adapter products and services to its customers.

KC,KCC Certification and Power Supply KC,KCC certification is a regulatory mark that indicates compliance with the applicable Korean standards for electrical safety and electromagnetic compatibility (EMC). It works as a trade passport that allows your product to be sold freely in South Korea, regardless of its country of origin. What is KC,KCC certification KC,KCC certification stands for Korea Certification and Korea Communications Commission certification. It is a mark that consists of the KC logo and a certificate number. It is also known as RRA (Radio Research Agency) certification, which is a unified mark for electrical safety and EMC compliance in South Korea. KC,KCC certification is based on third-party testing and certification by an accredited body, such as KTL (Korea Testing Laboratory), who is responsible for ensuring that the product meets the relevant Korean standards for electrical safety and EMC. The accredited body must also register the product with the KATS (Korean Agency for Technology and Standards) database. The KC,KCC mark must be visible and durable on the product or its packaging. The mark indicates that the product complies with the applicable Korean standards for electrical safety and EMC and also allows the authorities to trace the product back to the manufacturer or importer in case of any compliance issues. How to apply for KC,KCC certification for power adapter If your power adapter meets the applicable Korean standards for electrical safety and EMC, you can apply for KC,KCC certification for it. The main steps are as follows: Choose a qualified testing laboratory that can perform testing according to the applicable standards and regulations. You can find a list of accredited testing laboratories on the KTL website. Submit your product information and samples to the testing laboratory for testing. The testing laboratory will issue a test report after completing the testing. Choose an accredited body that can issue KC,KCC certificates according to the test report. You can find a list of accredited bodies on the KATS website. Submit your test report and other required documents to the accredited body for certification. The accredited body will issue a KC,KCC certificate and a certificate number after verifying the compliance of your product. Register your product with the KATS database using your certificate number and other product information. You need to pay a registration fee for each product family. Attach a label on your product or its packaging that contains the KC,KCC mark and your certificate number. Common Output Voltage, Current, and Power of Power Adapters Power devices are devices that can convert one form of electrical energy into another, such as batteries, chargers, adapters, etc. The output voltage of a power device is the voltage it provides to the load (such as mobile phones, laptops, light bulbs, etc.), usually expressed in volts (V). Different loads may require different output voltages, so the output voltages of power devices also vary. A power adapter is a device that can convert alternating current into direct current with different voltage and current, commonly used for charging or powering devices such as mobile phones, laptops, routers, etc. The output voltage, current, and power of the power adapter are important parameters that affect its performance and compatibility. This article will introduce and analyze these parameters. Output voltage: Output voltage refers to the voltage of the direct current provided by the power adapter to the load (such as mobile phones, laptops, etc.), usually expressed in volts (V). Different loads may require different output voltages, so the output voltage of the power adapter also varies. According to the commonly used output voltages in the world, according to the type of power adapter, there are several common output voltages: 5V: This is one of the most common output voltages, mainly used for charging low-power devices such as mobile phones, tablets, digital cameras, etc. The 5V output voltage is usually provided by the USB interface, so it is also called a USB adapter. A USB adapter can be a charger head that plugs directly into the wall, a USB port connected to a laptop or desktop computer, or a mobile power source, etc. 9V: This is another common output voltage, mainly used for powering medium and small devices such as wireless routers, speakers, printers, etc. The 9V output voltage is usually provided by a round plug, so it is also called a DC adapter. A DC adapter can be a transformer that plugs directly into the wall, or a converter connected to another device, etc. 12V: This is a higher output voltage, mainly used for powering large devices such as desktop computers, monitors, cameras, etc. The 12V output voltage is usually provided by a four-pin or eight-pin plug, so it is also called an AC adapter. An AC adapter can be a transformer that plugs directly into the wall, or a stabilizer connected to another device, etc. 15V: This is a newer output voltage, mainly used for charging high-performance devices such as laptops and tablets. The 15V output voltage is usually provided by the USB-C interface, so it is also called USB PD (Power Delivery) power. USB PD power can be a charger plugged directly into the wall, or a distributor connected to other devices, etc. 19V: This is an older output voltage, mainly used for powering high-power devices such as laptops and projectors. The 19V output voltage is usually provided by a round plug, so it is also called laptop adapter. Laptop adapter can be a converter plugged directly into the wall, or a regulator connected to other devices, etc. These are some common types and uses of output voltages. Of course, there are other more or less or more special output voltages, such as 3.7V, 4.2V, 24V, 36V, etc. Different output voltages correspond to different output powers and efficiencies. Therefore, when using or buying power devices, pay attention to match the parameters of the load and the power device. Otherwise it may cause insufficient charge or discharge or damage the device. Output current: Output current refers to the current passing through the load (such as mobile phones, laptops, etc.), usually expressed in amperes (A). Different loads may require different output currents, so the output current of the power adapter also varies. According to the commonly used output currents in the world, according to the type of power adapter, there are several common output currents: 1A: This is a small output current, mainly used for charging low-power devices such as Bluetooth headphones, wristbands, etc. The 1A output current is usually provided by the USB interface, so it is also called a USB adapter. A USB adapter can be a charger head that plugs directly into the wall, a USB port connected to a laptop or desktop computer, or a mobile power source, etc. 2A: This is a large output current, mainly used for charging high-power devices such as mobile phones, tablets, etc. The 2A output current is usually provided by the USB interface, so it is also called a USB adapter. A USB adapter can be a charger head that plugs directly into the wall, a USB port connected to a laptop or desktop computer, or a mobile power source, etc. 3A: This is a newer output current, mainly used for charging high-performance devices, such as laptops, tablets, etc. 3A output current is usually provided by USB-C interface, so it is also called USB PD (Power Delivery) adapter. USB PD adapter can be directly plugged into the wall charger, or connected to other devices’ distributor, etc. 4A: This is an older output current, mainly used for powering high-power devices, such as desktops, monitors, etc. 4A output current is usually provided by four-pin or eight-pin plug, so it is also called AC adapter. AC adapter can be directly plugged into the wall transformer, or connected to other devices’ stabilizer, etc. 5A: This is a higher output current, mainly used for powering high-power devices, such as projectors, cameras, etc. 5A output current is usually provided by round plug, so it is also called DC adapter. DC adapter can be directly plugged into the wall converter, or connected to other devices’ converter, etc. These are some common output current types and uses. Of course, there are also more or less or more special output currents, such as 0.5A, 1.5A, 2.5A, 3.5A, etc. Different output currents correspond to different output power and efficiency. Therefore, when using or buying power adapters, you should pay attention to match the load and power adapter parameters well, otherwise it may cause insufficient charge and discharge or damage the device. Output power: Output power refers to the power output by the load (such as mobile phones, laptops, etc.), usually expressed in watts (W). Different loads may require different output power, so the output power of the power adapter also varies. According to the commonly used output power in the world, according to the type of power adapter, there are several common output power: 5W: This is a small output power, mainly used for charging low-power devices such as Bluetooth headphones, wristbands, etc. The 5W output power is usually provided by the USB interface, and corresponds to the parameter combination of 5V and 1A. 10W: This is a large output power, mainly used for charging high-power devices such as mobile phones, tablets, etc. The 10W output power is usually provided by the USB interface, and corresponds to the parameter combination of 5V and 2A or 9V and 1.1A. 15W: This is a newer output power, mainly used for charging high-performance devices such as laptops and tablets. The 15W output power is usually provided by the USB-C interface, and corresponds to the parameter combination of 5V and 3A or 9V and 1.67A or 12V and 1.25A or 15V and 1A. 20W: This is an older output power, mainly used for powering high-power devices such as desktop computers, monitors, etc. The 20W output power is usually provided by a four-pin or eight-pin plug, and corresponds to the parameter combination of 12V and 1.67A or 19V and 1.05A. 25W: This is a higher output power, mainly used for powering high-power devices such as projectors, cameras, etc. The 25W output power is usually provided by a round plug, and corresponds to the parameter combination of 12V and 2.08A or 19V and 1.32A or 24V and 1.04A or 36V and 0.69A. These are some common output power types and uses, of course there are other more or less or more special output power, such as 7.5W, 18W, 30W, 45W, 60W, 90W, etc. Different output power corresponds to different output efficiency and compatibility, so when using or buying a power adapter, pay attention to match the parameters of the load and the power adapter well, otherwise it may cause insufficient charge or damage the device. Summary: Power adapter is a common electrical device, its output voltage, current, and power are important parameters that affect its performance and compatibility. When using or buying a power adapter, pay attention to choose the appropriate parameter combination according to the load’s needs, to ensure the normal operation and safe use of the device.
Oushangmei Technology Co., Ltd. is a professional manufacturer of ac dc power adapters, with years of research and development and manufacturing experience. The products cover various specifications of voltage and current, which can meet the needs of different customers. Oushangmei Technology Co., Ltd. pays attention to product quality and safety, and all power adapters have passed many national certifications and global safety certifications, such as GS, UL, CE, FCC, BS, SAA, CCC, PSE, KC and other global safety certifications. Power adapter safety certification refers to meeting the standards or regulations of various countries or regions on the safety performance of electrical products. After passing the inspection and certification by relevant institutions, it obtains corresponding certificates or marks. Safety certification can ensure that the product will not cause harm to human or property during use, and can also avoid market disputes or legal liabilities caused by unqualified products. Electrical products need to comply with the safety performance standards or regulations of various countries or regions when they are sold and used in the global market, in order to ensure that the products will not cause harm to human or property. In order to prove that the products meet these requirements, they usually need to pass the inspection and certification by relevant institutions and obtain corresponding certificates or marks. This is what is called global safety certification. There are many types of global safety certification, and different countries or regions have different certification systems and standards. Generally speaking, they can be divided into the following categories according to regions: European safety certification: mainly include CE, GS, CB, VDE, TUV and other marks, applicable to the European Union and its related countries or regions. American safety certification: mainly include UL, FCC, ETL and other marks, applicable to the United States and its related countries or regions. Japanese safety certification: mainly include PSE, JET, JQA and other marks, applicable to Japan and its related countries or regions. Australian safety certification: mainly include SAA, RCM and other marks, applicable to Australia and its related countries or regions. Chinese safety certification: mainly include CCC, CQC and other marks, applicable to China and its related countries or regions. Korean safety certification: mainly include KC, KCC and other marks, applicable to Korea and its related countries or regions. Other safety certifications: there are also some other safety certifications, such as BS (UK), IRAM (Argentina), INMETRO (Brazil), SASO (Saudi Arabia), NOM (Mexico), etc. Oushangmei Technology Co., Ltd. is a professional manufacturer of power adapters, with more than 10 years of production experience. The products cover various specifications of voltage and current, which can meet the needs of different customers. Oushangmei Technology Co., Ltd. pays attention to product quality and safety. All power adapters have passed many national certifications, such as GS, UL, CE, FCC, BS, SAA, CCC, PSE, KC and other global safety certifications. These certifications can not only ensure that the products will not cause danger during use, but also improve the competitiveness and reputation of the products in the global market. Oushangmei Technology Co., Ltd.

Global Safety Certification

Our Adapters Have Past Global Safety Certifications like GS, UL/cUL, CE, FCC, BS, SAA, CCC, PSE, KC, And Much More…

Power adapter is a device that converts AC power to DC power, widely used in various small portable electronic devices and electronic appliances, such as security cameras, set-top boxes, routers, light strips, massagers and so on. The quality and safety of power adapter directly affect the performance and life of the device, as well as the personal and property safety of users. Therefore, choosing a high-quality power adapter is very important. Oushangmei ac dc power supply Technology Co., Ltd. is a professional manufacturer of power adapters, with more than 10 years of production experience. The products cover various specifications of voltage and current, which can meet the needs of different customers. Oushangmei ac dc power supply Technology Co., Ltd. pays attention to product quality and safety. The power adapters produced by Oushangmei ac dc power supply Technology Co., Ltd. have the following characteristics: Safe and reliable: All power adapters have passed many national certifications, such as GS, UL, CE, FCC, BS, SAA, CCC, PSE, KC and other global safety certifications. These certifications can ensure that the products will not cause harm to human or property during use, and also improve the competitiveness and reputation of the products in the global market. Strict testing: Each factory power adapter has undergone more than 3 hours of aging test. Aging test refers to the long-term operation test of the product under extreme conditions such as high temperature or high pressure to test the stability and reliability of the product. Aging test can effectively filter out unqualified or inferior products, improve the product qualification rate and life. 9-fold intelligent protection: All power adapters adopt multiple protection measures, such as over-voltage protection, over-current protection, over-temperature protection, short-circuit protection and so on. These protection measures can prevent product damage or fire in abnormal situations, and ensure the safety of users and devices. 28 reliable performance tests: All power adapters have passed 28 reliable performance tests. These tests include input-output characteristic test, efficiency test, temperature rise test, noise test and so on. These tests can verify whether the performance indicators of the product under various working conditions meet the standard requirements. Power supply strict random sampling: Oushangmei ac dc power supply Technology Co., Ltd. has carried out strict random sampling for all power supplies produced by Oushangmei ac dc power supply Technology Co., Ltd. Random sampling refers to randomly extracting a part of products from batch products for inspection or test according to a certain proportion. Random sampling can effectively supervise and control product quality, and timely find and solve problems.

Safety & Reliability Strict Testing

9-Fold Intelligent Protection, 28 Reliable Performance Tests, All Power Supplies & Adapters are Strictly Randomly Sampled…

A power adapter is a device that converts AC input to DC output for small portable electronic devices and appliances. It usually consists of a shell, a transformer, an inductor, a capacitor, a control IC, a PCB board and other components. It can be classified into wall-mounted and desktop types according to the connection mode. It is widely used for security cameras, set-top boxes, routers, light strips, massagers and other devices. Oushangmei Technology Co., Ltd. is a professional manufacturer of various power adapters, with advanced production equipment and testing instruments, as well as a high-quality technical and management team. We are committed to providing customers with high-quality, high-performance, high-efficiency and high-safety power adapter products. We produce typc charger products with various specifications and models to choose from, meeting different power and voltage requirements, such as 45W, 65W, 90W, etc., and 5V, 9V, 12V, 15V, 20V, etc. Our power adapter products have passed strict energy certification and environmental certification, meeting the level 6 energy efficiency standards of Europe and America, saving energy and reducing carbon emissions. At the same time, our products also meet the environmental standards of RoHS, Reach, etc., containing no harmful substances, protecting human health and the earth’s environment. We have a complete range of products, covering different output voltage and current ranges, which can meet the needs of different customers. We can also customize products according to customer’s special requirements, providing personalized service. Our products have been exported to Europe, America, Asia and other countries and regions.Oushangmei Technology Co., Ltd. is your trustworthy power adapter supplier. We will provide you with the best solutions with our high-quality products and services. You are welcome to contact us at any time for consultation or ordering.

Energy Saving & Environmental

Comply with Level 6 Energy Efficiency Standard, Environmental Protection standards such as RoHS, Reach, etc...

Shenzhen OUSM Power Technology Co., Ltd. is a high-tech enterprise specializing in the production and development of various power adapters. The company has perfect production equipment and testing equipment, a first-class sales team and an independent high-level research and development team. The company's products have passed CCC, cETL 1310, CE, UL/Cul, FCC, KC, SAA, C/tick, CB, TUV/GS, ROHS and other certifications. The product quality is reliable, stable and safe. The company's products are widely used in security cameras, set-top boxes, routers, light strips, massagers and other equipment, and are trusted and praised by customers. Power adapter is a power supply conversion device for small portable electronic devices and electronic appliances, generally composed of shell, transformer, inductor, capacitor, control IC, PCB board and other components. It works by converting AC input to DC output; it can be divided into wall-mounted and desktop types according to the connection mode1 Power adapters are widely used in industrial automation control, military equipment, scientific research equipment, LED lighting, industrial control equipment, communication equipment, power equipment, instruments and meters, medical equipment, semiconductor refrigeration and heating, air purifier, electronic refrigerator, liquid crystal display, LED lamps, audio-visual products, security, computer case, digital products and instruments and other fields. Oushangmei Technology Co., Ltd.: A Professional Power Adapter Manufacturer Quality assurance, safety and reliability Our company's products have passed multiple international and domestic authoritative certifications, including ISO9001 quality management system certification; China's CCC certification; EU's CB certification, CE certification, and GS certification, RoHS certification; U.S.'s FCC certification, ETL certification, and UL certification; Australia's C-tick certification; and Korea's KC certification and KCC certification. Building a High-Quality Power Adapter Manufacturer Our production capacity can reach 90,000 units per month. We have a complete production line with plug-in lines, wave soldering, power integrated testing lines, fully automatic aging rooms, laser engraving machines, high-performance power analyzers, oscilloscopes, and other equipment to build a high-quality power adapter manufacturer. Customized products for customers Our company has a professional R&D team of five people, covering talents in various fields such as circuit design, safety evaluation, appearance design, structural design, and technical management. We can plan and design products based on customers' functional needs and provide customized, reasonably configured, and cost-effective products. Customized products for customers Our company has a professional R&D team of five people, covering talents in various fields such as circuit design, safety evaluation, appearance design, structural design, and technical management. We can plan and design products based on customers' functional needs and provide customized, reasonably configured, and cost-effective products. Shenzhen Oushangmei Technology Co., Ltd. is a leading manufacturer and R&D company that produces high-quality power supplies, including switch power supplies, power adapters, LED power supplies, waterproof power supplies, and more. Oushangmei Technology Co., Ltd. takes quality as life, customer as center, innovation as power, and integrity as foundation, and constantly pursues excellence and improvement. We look forward to establishing a long-term cooperative relationship with you and developing together.

OUSM Adapters Long Service Life

Use Imported IC scheme, Long Life Electrolytic Capacitor Resistant to High Temperature, Small ESR, Small Output Ripple…

2012

Year of Establishment

150+

Employees

10+

R&D Engineers

1500+

Factory Floor Area

50+

Models

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This was an excellent product and it was delivered on time. Packaging was also excellent. Mr Lee was excellent to deal with we will be reordering from them.

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It works perfectly and good support from Shenzhen Oushangmei. Product was as described and tested excellent. We placed a large order. Thank you!

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The performance of adapter is great.Kind and quick response. Good price, quick delivery to The Netherlands. We will buy more from you very soon. 👌👌👌

How to distinguish the positive and negative poles of a power adapter? The power adapter is a device that converts alternating current (AC) from a wall outlet into low-voltage direct current (DC) for various electronic devices, such as laptops, phones, tablets, etc. However, when connecting a power adapter to a machine, it is essential to distinguish the positive and negative poles of the power adapter because they may affect the performance and safety of the device. In this essay, I will explain how to distinguish positive and negative poles of power adapters and why it matters. First, let us define a power adapter's positive and negative poles. According to Wikipedia, polarity symbols are markings found on electrical equipment and power supplies that indicate the polarity of the electrical terminals or connectors. The polarity symbols usually consist of a plus (+) sign for the positive pole and a minus (-) sign for the negative bar. The polarity symbols are sometimes shown as dots or stripes on the wires or connectors. The polarity of the power adapter cord and plug must match the polarity of the device, meaning that the positive contact of the plug must mate with the positive communication in the receptacle, and the harmful plug contact must mate with the negative receptacle contact. If the polarity is reversed, it may cause damage to the device or create a short circuit. So how can we distinguish the positive and negative poles of the power adapter? We can use several methods, depending on the type and design of the power adapter. Here are some standard techniques: Check the label on the power adapter. Most power adapters have a title showing the power adapter's output voltage, current, and polarity. The brand may use a diagram or text to indicate which wire or pin is positive or negative. For example, a graph may show a circle with a dot in the center and a line outside. The dot represents the center pin of the plug, and the line represents the outer shield of the plug. A plus or minus sign next to them indicates their polarity. A text may state "center positive" or "center negative" to indicate their polarity. Check the color of the wires or connectors. Some power adapters use different colors to indicate their wires' or connectors' positive and negative poles. For example, according to wikiHow, the red wire is usually positive, the black wire is generally negative, and the white wire (if present) is usually ground (sometimes called neutral in DC). If both wires are black, but one has a white stripe, the striped wire is generally negative, while the plain black wire is usually upbeat. Use a multimeter to test the polarity. A multimeter is a device that can measure voltage, current, resistance, and other electrical properties. It has two probes: red for positive and black for negative. To test the polarity of a power adapter with a multimeter, we need to do the following steps: Plug the power adapter into a wall outlet. Set the multimeter to DC voltage mode. Place the red probe into the center pin of the plug. Place the black probe onto the outer shield of the plug. Read the voltage on the multimeter display. If it is positive, then the center pin is positive, and the outer shield is negative. If it is negative, then the center pin is negative, and the external protection is positive. In conclusion, distinguishing a power adapter's positive and negative poles is essential for connecting it to a device correctly and safely. We can use different methods to determine them, such as checking labels and colors or using multimeters. We should always ensure we match the polarity of our power adapters and devices before using them.

JERRY FREEMAN

For more than 11 years, Oushangmei Technology Co.,Ltd has been a trusted global partner for businesses looking to grow online.