GB/T 47339-2026General specification for small brushless DC fans (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part

1.Structure and Drafting Rules of Standardization Documents". Drafting. Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents. This document was proposed by the Ministry of Industry and Information Technology of the People's Republic of China. This document is under the jurisdiction of the National Technical Committee on Standardization of Micromotors and Components for the Information Industry (SAC/TC528). This document was drafted by: Shanghai Micro Motor Research Institute (21st Research Institute of China Electronics Technology Group Corporation) and Changzhou Xiangming Intelligent Power. Joint-stock companies, Hangzhou Micro-Optics Co., Ltd., Zhejiang TEDA Micro Motor Co., Ltd., Suzhou Telecom Motor Factory Co., Ltd., Shenzhen Deda Xing Drive Technology Co., Ltd., China Electronics Technology Standardization Institute, Zhejiang Lianyi Motor Co., Ltd., Ningbo Zhongda Lide Intelligent Transmission Co., Ltd., Zhejiang Dongzheng Electric Co., Ltd., Chengdu Micro-Precision Motor Co., Ltd., Sichuan Anhe Precision Electronics Co., Ltd. The company, Chengdu Precision Motor Co., Ltd., CETC Robotics Co., Ltd., Guizhou Aerospace Linquan Motor Co., Ltd., and Wolong Electric Drive Group Joint-stock company, Guizhou Huafeng Electric Co., Ltd., Zhongshan Dayang Electric Co., Ltd., Xi'an Micro Motor Research Institute Co., Ltd. Harbin Institute of Technology, Zibo Institute of Metrology, Shenzhen Thompson Technology Co., Ltd., and Nanjing Jinqi New Energy Power Research Institute have Limited Liability Company, Shanghai Malu Daily Use Automotive Electric Co., Ltd., Jiangsu Shangqi Group Co., Ltd., and Suzhou Black Shield Environment Co., Ltd. The main drafters of this document are. Huang Haiying, Zhang Min, Yu Xiang, Qiu Rongquan, Yao Weiliang, Zhang Wenyong, Huang Xin, Chen Zheng, Bi Haitao, Du Shan, and Chen Huaping. Jin Yan, Su Wei, Chen Qiang, Yan Weican, Peng Wei, Cen Guojian, Wang Liyun, Luo Xiuyang, He Gaopeng, Peng Shengjun, Xu Dong, Jin Long, Zou Jibin, Liang Sanzeng Li Zhongjun, Song Longbo, Tan Jinxi, Zhou Qinghui, Guo Jing, Zhang Ruigang, Sun Zhiqiang, Hou Chaoqin, Xu Zhaoming, Guo Shiliang. General technical specifications for small brushless DC fans

1 Scope

GB/T 47339-2026 is the Chinese national standard covering the small brushless fan - the part that cools nearly every piece of electronic equipment, specified on airflow and pressure, speed control, noise, bearing life and the electrical and thermal requirements. First edition, in force since 1 October 2026. It was issued on 31 March 2026 and takes effect on 1 October 2026, as a first edition. The document is under the responsibility of the Ministry of Industry and Information Technology. This page is published from the official record of the 2026 edition; the clause text of a standard this recent is not yet in circulation, and the figures, limits and tables it contains are those of the document itself, delivered in full with the English translation.

This document specifies the technical requirements, inspection methods, inspection rules, packaging, transportation, and other aspects for small brushless DC fans (hereinafter referred to as "fans"). Storage and other requirements. This document applies to small, non-fan-shaped fans with an outer diameter not exceeding 300mm used in electronic information, communication, and other equipment requiring heat dissipation. Brushed DC fans. This document should also be used for other brushless DC fans.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included. For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies. This document.

GB/T 1236-2017 Performance Test of Standardized Air Ducts for Industrial Ventilation Fans

GB/T 2423.1 Environmental testing of electronic and electrical products - Part

3 Terms and Definitions

The following terms and definitions apply to this document.

3.1 Then the speed of the lowspeed The rotational speed of the fan when it returns to normal after various environmental tests and high-temperature life tests.

3.2 benchmark speed The stable rotational speed measured before all environmental tests are conducted.