GB20943-2013
Minimum allowable values of energy efficiency and evaluating values of energy conservation for single voltage external AC-DC and AC-AC power supplies
单路输出式交流－直流和交流－交流外部电源能效限定值及节能评价值
GB 20943-2013 is a current mandatory Chinese national standard for Minimum allowable values of energy efficiency and evaluating values of energy conservation for single voltage external AC-DC and AC-AC power supplies. It appears in the Construction compliance cluster with a electrical safety focus and has an implementation date of Sep 1, 2014.
Applicability depends on product scope, certification route, competent authority notices and transition rules. Requst for the translation or verify source before using this record in a compliance decision.
Compliance overview
Scope and applicability
This standard applies to single voltage external AC-DC and AC-AC power supplies that convert 220V, 50Hz AC voltage into a fixed, single low-voltage DC or AC output (not exceeding 36V), with a rated output power not exceeding 250W. It is not applicable to DC-DC power supplies or special-purpose products for industrial equipment and medical devices. Manufacturers of external power supplies for consumer electronics must verify compliance with this standard.
Technical requirements
The standard specifies the minimum allowable values of energy efficiency and the evaluating values of energy conservation for external power supplies. Clause 4.1 regarding energy efficiency limits is mandatory. It defines requirements for average efficiency in active mode, calculated based on performance at 100%, 75%, 50%, and 25% of rated output current. The standard also sets strict limits for no-load power consumption. Products are categorized by output power and specific voltage/current characteristics (e.g., nominal voltage less than 6V and nominal current greater than or equal to 550mA) to determine the appropriate conservation evaluating values. Compliance with both the mandatory minimum limits and the recommended conservation values is essential for market access.
Testing methods
Testing must be conducted in an environment with a temperature of 23±5°C and specific air flow restrictions. The standard outlines procedures for measuring active mode efficiency and no-load active power using calibrated power meters with specified resolutions. Tests involve pre-heating the device for 30 minutes and measuring input/output power at four different load levels (100%, 75%, 50%, 25% of rated current). For products with a nominal output power less than 1W used with household appliances, testing may reference conditions specified in GB 4706.18-2005.
FAQs
What products are regulated under GB 20943-2013?
It regulates single voltage external AC-DC and AC-AC power supplies with an output voltage not exceeding 36V and a rated output power up to 250W, operating on a 220V/50Hz supply.
Is GB 20943-2013 mandatory?
Yes, Clause 4.1, which specifies the minimum allowable values of energy efficiency (including average efficiency and no-load power limits), is mandatory for all applicable products.
Are there any updates from the previous version of GB 20943?
Yes, compared to GB 20943-2007, this version increases the energy efficiency indicator requirements, deletes the target energy efficiency limit, and adds testing provisions for products with a nominal output power less than 1W.
The summary above provides a high-level overview of GB 20943-2013. To ensure complete compliance for your products entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 20943-2013 today to access all detailed parameters, tables, and testing procedures.
Applicability hints
- Type
- Management
- CCS
- F01
- ICS
- 27.010
- Competent department
- Standardization Administration of China
- Technical committee
- National Technical Committee on Energy Fundamentals and Management of Standardization Administration of China