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GB 20943-2025 English PDF

GB 20943-2025 English PDF

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GB 20943-2025: Minimum allowable values of energy efficiency and energy efficiency grades for AC-DC and AC-AC power supplies

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Scope

This document specifies the energy efficiency grades and minimum allowable values of energy
efficiency of power supplies (hereinafter referred to as products) that convert AC voltage into
low-voltage DC (not more than 60 V) or low-voltage AC (not more than 42.4 V) output voltage
under 220 V, 50 Hz power supply conditions, and describes the corresponding test methods.
This document applies to.
a) External power supplies with a rated output power of not more than 500 W and
internal power supplies for microcomputers and servers with a rated output power of
not more than 27.5 kW;
b) Extension cord socket-outlets, wall-mounted socket-outlets and power supply parts
of converters with universal serial bus (USB) port adapters.
This document does not apply to combined products with external power supplies as auxiliary
functions, combined products with batteries (including products for charging independent
batteries), external power supplies with wireless charging function, and Power Over Ethernet
(POE) external power supplies other than b), nor to products that power industrial equipment,
means of transportation, and medical apparatus and instruments.

Basic Data

Standard ID GB 20943-2025 (GB20943-2025)
Description (Translated English) Minimum allowable values of energy efficiency and energy efficiency grades for AC-DC and AC-AC power supplies
Sector / Industry National Standard
Classification of Chinese Standard F01
Classification of International Standard 27.010
Word Count Estimation 22,271
Date of Issue 2025-01-24
Date of Implementation 2027-02-01
Issuing agency(ies) State Administration for Market Regulation, China National Standardization Administration


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