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

小型无刷直流风机通用技术条件

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

March 31, 2026

Implementation date

October 1, 2026

Scope

GB/T 47339-2026 is the English-translated version of 小型无刷直流风机通用技术条件.

GB/T 47339-2026 is the Chinese standard "General specification for small brushless DC fans". Its scope clause reads: 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. Its clauses include terms and definitions.

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Document preview — GB/T 47339-2026

National Standard of the People's Republic of China

ICS: 29.160.01
Classification: K 24

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Preface
1.Scope
2 Normative References
3.Terms and Definitions
4.Classification
4.1 Voltage Level
4.2 Naming Rules
4.3 Environmental Conditions for Use
5.Technical Requirements
5.1 Appearance
5.2 External Shape and Installation Dimensions
5.3 Lead-out methods and markings
5.4 Wind direction and direction
5.5 Reference speed
5.6 Then the speed is
5.7 Starting Current
5.8 Operating Current
5.9 Insulation resistance
5.10 Dielectric strength of insulation
5.11 Weight
5.12 Self-vibration
5.13 Sound Pressure Level Noise
5.14 Airflow Characteristics
5.15 Speeding
5.16 Speed Regulation Performance
5.17 Winding temperature rise
5.18 Low temperature
5.19 High Temperature
5.20 Low pressure
5.21 Vibration
5.22 Impact
5.23 Constant humidity and heat
5.24 Salt spray
5.25 Electromagnetic Compatibility
5.26 High-temperature lifespan
6.Test methods 7.
6.1 Test Conditions
6.2 Appearance
6.3 External dimensions and installation dimensions
6.4 Lead-out methods and markings
6.5 Wind direction and direction
6.6 Reference speed
6.7 Starting Current
6.8 Operating current
6.9 Insulation resistance
6.10 Dielectric strength of insulation
6.11 Weight
6.12 Self-vibration
6.13 Sound Pressure Level Noise
6.14 Airflow Characteristics
6.15 Speeding
6.16 Speed regulation performance
6.17 Winding temperature rise
6.18 Low temperature
6.20 Low pressure
6.21 Vibration
6.22 Impact
6.23 Constant humidity and heat
6.24 Salt spray
6.25 Electromagnetic Compatibility
6.26 High-temperature lifespan
7.Inspection Rule
7.1 Inspection Classification
7.2 Identification and testing
7.3 Quality Consistency Inspection
8.Delivery Preparation
8.1 Nameplate
8.2 Packaging
8.3 Transportation
8.4 Storage
8.5 Quality guarantee period
Appendix A (Normative) External Dimensions and Installation
Appendix B (Normative) Basic Parameters

1 Scope

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 2.Test methods – Test A. Low temperature

GB/T 2423.2 Environmental testing of electronic and electrical products – Part 2.Test methods – Test B. High temperature

GB/T 2423.5-2019 Environmental Testing – Part 2.Test Methods – Test Ea and Guidelines. Impact

GB/T 2423.10-2019 Environmental testing – Part 2.Test methods – Test Fc. Vibration (sine)

GB/T 2423.17 Environmental testing of electronic and electrical products – Part 2.Test methods – Test Ka. Salt spray

GB/T 2423.27-2020 Environmental Testing - Part 2.Test Methods - Test Methods and Guidelines. Temperature/Low Pressure or High Temperature

Comprehensive test of temperature/humidity/low air pressure

GB/T 2828.1 Sampling Procedures for Inspection by Attributes - Part 1.Sampling Schemes Retrieved by Acceptable Quality Limit (AQL) for Lot-by-Lot Inspection

GB/T 2888 Noise Measurement Method for Fans and Roots Blowers

GB/T 7345-2008 Basic Technical Requirements for Control Motors

GB/T 10068-2020 Mechanical Vibration of Motors with Shaft Center Height of 56mm and Above. Measurement, Evaluation and Limits

GB/T 12665-2017 Requirements for damp heat test of electric motors used under general environmental conditions

GB/T 17626 Electromagnetic compatibility testing and measurement techniques

GB/T 17799.1-2017 Electromagnetic Compatibility General Standard. Immunity in Residential, Commercial and Light Industrial Environments

GB 17799.3-2023 General Standard for Electromagnetic Compatibility – Part 3.Emissions from Equipment in Habitat Environments

JB/T 6445-2017 Overspeed test of fan impeller

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.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 20 pages — is available in the English PDF.

Referenced standards

Normative references

GB/T 17626

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