GB/T 47339-2026 General specification for small brushless DC fans English, Anglais, Englisch, Inglés, えいご
This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered.
ICS
CCS
National Standard of the People's Republic of China
GB/T 47339-2026
General specification for small brushless DC fans
小型无刷直流风机通用技术条件
Issue date: 2026-03-31 Implementation date: 2026-10-01
Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
the Standardization Administration of the People's Republic of China
Contents
Foreword
1 Scope
2 Normative References
3 Terms and Definitions
4 Classification
4.1 Voltage Ratings
4.2 Designation Rules
4.3 Operating Environmental Conditions
5 Technical Requirements
5.1 Appearance
5.2 External Dimensions and Mounting Dimensions
5.3 Lead Arrangement and Marking
5.4 Airflow Direction and Rotation Direction
5.5 Benchmark Speed
5.6 Follow Speed
5.7 Starting Current
5.8 Operating Current
5.9 Insulation Resistance
5.10 Dielectric Strength
5.11 Mass
5.12 Self Induced Vibration
5.13 Sound Pressure Level Noise
5.14 Airflow Characteristics
5.15 Overspeed
5.16 Speed Regulation Performance
5.17 Winding Temperature Rise
5.18 Low Temperature
5.19 High Temperature
5.20 Low Air Pressure
5.21 Vibration
5.22 Shock
5.23 Damp Heat, Steady State
5.24 Salt Mist
5.25 Electromagnetic Compatibility
5.26 High Temperature Life Test
6 Test Methods
6.1 Test Conditions
6.2 Appearance
6.3 External Dimensions and Mounting Dimensions
6.4 Lead Arrangement and Marking
6.5 Airflow Direction and Rotation Direction
6.6 Benchmark Speed
6.7 Starting Current
6.8 Operating Current
6.9 Insulation Resistance
6.10 Dielectric Strength
6.11 Mass
6.12 Self Induced Vibration
6.13 Sound Pressure Level Noise
6.14 Airflow Characteristics
6.15 Overspeed
6.16 Speed Regulation Performance
6.17 Winding Temperature Rise
6.18 Low Temperature
6.19 High Temperature
6.20 Low Air Pressure
6.21 Vibration
6.22 Shock
6.23 Damp Heat, Steady State
6.24 Salt Mist
6.25 Electromagnetic Compatibility
6.26 High Temperature Life Test
7 Inspection Rules
7.1 Classification of Inspections
7.2 Qualification Inspection
7.3 Quality Conformity Inspection
8 Delivery Preparation
8.1 Nameplate
8.2 Packaging
8.3 Transport
8.4 Storage
8.5 Warranty Period
Annex A (Normative) External Dimensions and Mounting Dimensions
Annex B (Normative) Basic Parameters
General specification for small brushless DC fans
1 Scope
This document specifies the technical requirements, test methods, inspection rules, packaging, transport and storage for small brushless DC fans (hereinafter referred to as “fans”).
This document applies to small brushless DC fans with an impeller outer diameter not greater than 300 mm used in electronic information equipment, communication equipment and other equipment requiring cooling. Other brushless DC fans may also refer to this document.
2 Normative References
The following documents are essential for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 1236-2017 Industrial fans — Performance testing using standardized airways
GB/T 2423.1 Environmental testing for electric and electronic products — Part 2: Test methods — Test A: Cold
GB/T 2423.2 Environmental testing for electric and electronic products — Part 2: Test methods — Test B: Dry heat
GB/T 2423.5-2019 Environmental testing — Part 2: Test methods — Test Ea and guidance: Shock
GB/T 2423.10-2019 Environmental testing — Part 2: Test methods — Test Fc: Vibration (sinusoidal)
GB/T 2423.17 Environmental testing for electric and electronic products — Part 2: Test methods — Test Ka: Salt mist
GB/T 2423.27-2020 Environmental testing — Part 2: Test methods — Test method and guidance: Combined temperature/low air pressure or temperature/humidity/low air pressure
GB/T 2828.1 Sampling procedures for inspection by attributes — Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot by lot inspection
GB/T 2888 Measurement of noise for fans and Roots blowers
GB/T 7345-2008 General requirements for control motors
GB/T 10068-2020 Mechanical vibration of machines with shaft heights 56 mm and higher — Measurement, evaluation and limits of vibration
GB/T 12665-2017 Requirements of damp heat testing of electrical machines for service in general environmental conditions
GB/T 17626 Electromagnetic compatibility — Testing and measurement techniques
GB/T 17799.1-2017 Electromagnetic compatibility — Generic standards — Immunity for residential, commercial and light industrial environments
GB 17799.3-2023 Electromagnetic compatibility — Generic standards — Part 3: Emission for equipment in residential environments
JB/T 6445-2017 Overspeed test for fan impellers
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1 follow speed
The speed measured after the fan has returned to normal conditions following various environmental tests and the high temperature life test.
3.2 benchmark speed
The stable speed measured before all environmental tests.
4 Classification
4.1 Voltage ratings
The operating voltage of the fan is DC voltage, selected from the following values:
4.5 V, 6 V, 12 V, 15 V, 24 V, 28 V, 36 V, 48 V, 60 V and 110 V.
4.2 Designation rules
4.2.1 Type designation
The type designation of the fan consists of the following parts:
4.2.2 Fan size designation
The fan size designation is expressed by the millimetre dimension of the fan impeller outer diameter.
4.2.3 Product name code
The product name code consists of 3 to 4 uppercase Chinese Pinyin letters, as shown in Table 1.
4.2.4 Performance parameter code
For axial flow fans, the performance parameter code consists of 3 to 4 Arabic numerals, with a hyphen between the second and third digits. The first Arabic numeral indicates the voltage rating, with codes as shown in Table 2; the second Arabic numeral indicates the rotational speed, with codes as shown in Table 3; the third and fourth Arabic numerals indicate the axial length of the fan in millimetres. For centrifugal fans, the performance parameter code is specified in the product specific technical specification.
4.2.5 Example
100FZW23 08 indicates a basic type brushless DC axial flow fan with an impeller outer diameter of 100 mm, an operating voltage of 12 V, a benchmark speed of 3500 r/min to 4499 r/min, and an axial length of 8 mm.
4.3 Operating environmental conditions
The general operating environmental conditions for fans shall be selected according to Table 4 or the product specific technical specification.
5 Technical Requirements
5.1 Appearance
The surface of the fan shall be free from corrosion, peeling, dents and scratches. Fasteners shall be securely connected. A nameplate shall be affixed in a conspicuous position on the fan, shall not be detachable, and shall be clearly and correctly marked. The fan shall have the airflow direction and rotation direction marked on it.
5.2 External dimensions and mounting dimensions
Unless otherwise specified, the external dimensions and mounting dimensions of the fan shall comply with the provisions of Annex A.
5.3 Lead arrangement and marking
Fan power input shall be via lead wires, terminals or electrical connectors. The lead wire length shall not be less than 200 mm. The colour or marking shall comply with Table 5 or the product specific technical specification.
5.4 Airflow direction and rotation direction
The fan shall have markings for airflow direction and rotation direction on the housing or nameplate. The fan shall operate smoothly when energised, and the airflow direction and rotation direction shall correspond to the markings.
5.5 Benchmark speed
The benchmark speed of the fan shall comply with Annex B or the product specific technical specification.
5.6 Follow speed
The follow speed shall not be less than 90 % of the benchmark speed. After the low temperature test, the follow speed shall not be less than 80 % of the benchmark speed.
5.7 Starting current
When required, the starting current of the fan shall comply with the product specific technical specification.
5.8 Operating current
The operating current of the fan shall comply with Annex B or the product specific technical specification.
5.9 Insulation resistance
The insulation resistance between the lead ends and the casing of the fan shall comply with the following provisions:
a) At room temperature: insulation resistance shall not be less than 50 MΩ;
b) At high temperature: insulation resistance shall not be less than 10 MΩ;
c) Under damp heat conditions: insulation resistance shall not be less than 1 MΩ.
5.10 Dielectric strength
The manufacturer shall specify the dielectric strength of the fan. The space between the lead ends and the casing of the fan shall withstand the test voltage specified in Table 6 for a
Standard
GB/T 47339-2026 General specification for small brushless DC fans (English)
GB/T 47339-2026 General specification for small brushless DC fans English, Anglais, Englisch, Inglés, えいご
This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered.
ICS
CCS
National Standard of the People's Republic of China
GB/T 47339-2026
General specification for small brushless DC fans
小型无刷直流风机通用技术条件
Issue date: 2026-03-31 Implementation date: 2026-10-01
Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
the Standardization Administration of the People's Republic of China
Contents
Foreword
1 Scope
2 Normative References
3 Terms and Definitions
4 Classification
4.1 Voltage Ratings
4.2 Designation Rules
4.3 Operating Environmental Conditions
5 Technical Requirements
5.1 Appearance
5.2 External Dimensions and Mounting Dimensions
5.3 Lead Arrangement and Marking
5.4 Airflow Direction and Rotation Direction
5.5 Benchmark Speed
5.6 Follow Speed
5.7 Starting Current
5.8 Operating Current
5.9 Insulation Resistance
5.10 Dielectric Strength
5.11 Mass
5.12 Self Induced Vibration
5.13 Sound Pressure Level Noise
5.14 Airflow Characteristics
5.15 Overspeed
5.16 Speed Regulation Performance
5.17 Winding Temperature Rise
5.18 Low Temperature
5.19 High Temperature
5.20 Low Air Pressure
5.21 Vibration
5.22 Shock
5.23 Damp Heat, Steady State
5.24 Salt Mist
5.25 Electromagnetic Compatibility
5.26 High Temperature Life Test
6 Test Methods
6.1 Test Conditions
6.2 Appearance
6.3 External Dimensions and Mounting Dimensions
6.4 Lead Arrangement and Marking
6.5 Airflow Direction and Rotation Direction
6.6 Benchmark Speed
6.7 Starting Current
6.8 Operating Current
6.9 Insulation Resistance
6.10 Dielectric Strength
6.11 Mass
6.12 Self Induced Vibration
6.13 Sound Pressure Level Noise
6.14 Airflow Characteristics
6.15 Overspeed
6.16 Speed Regulation Performance
6.17 Winding Temperature Rise
6.18 Low Temperature
6.19 High Temperature
6.20 Low Air Pressure
6.21 Vibration
6.22 Shock
6.23 Damp Heat, Steady State
6.24 Salt Mist
6.25 Electromagnetic Compatibility
6.26 High Temperature Life Test
7 Inspection Rules
7.1 Classification of Inspections
7.2 Qualification Inspection
7.3 Quality Conformity Inspection
8 Delivery Preparation
8.1 Nameplate
8.2 Packaging
8.3 Transport
8.4 Storage
8.5 Warranty Period
Annex A (Normative) External Dimensions and Mounting Dimensions
Annex B (Normative) Basic Parameters
General specification for small brushless DC fans
1 Scope
This document specifies the technical requirements, test methods, inspection rules, packaging, transport and storage for small brushless DC fans (hereinafter referred to as “fans”).
This document applies to small brushless DC fans with an impeller outer diameter not greater than 300 mm used in electronic information equipment, communication equipment and other equipment requiring cooling. Other brushless DC fans may also refer to this document.
2 Normative References
The following documents are essential for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 1236-2017 Industrial fans — Performance testing using standardized airways
GB/T 2423.1 Environmental testing for electric and electronic products — Part 2: Test methods — Test A: Cold
GB/T 2423.2 Environmental testing for electric and electronic products — Part 2: Test methods — Test B: Dry heat
GB/T 2423.5-2019 Environmental testing — Part 2: Test methods — Test Ea and guidance: Shock
GB/T 2423.10-2019 Environmental testing — Part 2: Test methods — Test Fc: Vibration (sinusoidal)
GB/T 2423.17 Environmental testing for electric and electronic products — Part 2: Test methods — Test Ka: Salt mist
GB/T 2423.27-2020 Environmental testing — Part 2: Test methods — Test method and guidance: Combined temperature/low air pressure or temperature/humidity/low air pressure
GB/T 2828.1 Sampling procedures for inspection by attributes — Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot by lot inspection
GB/T 2888 Measurement of noise for fans and Roots blowers
GB/T 7345-2008 General requirements for control motors
GB/T 10068-2020 Mechanical vibration of machines with shaft heights 56 mm and higher — Measurement, evaluation and limits of vibration
GB/T 12665-2017 Requirements of damp heat testing of electrical machines for service in general environmental conditions
GB/T 17626 Electromagnetic compatibility — Testing and measurement techniques
GB/T 17799.1-2017 Electromagnetic compatibility — Generic standards — Immunity for residential, commercial and light industrial environments
GB 17799.3-2023 Electromagnetic compatibility — Generic standards — Part 3: Emission for equipment in residential environments
JB/T 6445-2017 Overspeed test for fan impellers
3 Terms and Definitions
The following terms and definitions apply to this document.
3.1 follow speed
The speed measured after the fan has returned to normal conditions following various environmental tests and the high temperature life test.
3.2 benchmark speed
The stable speed measured before all environmental tests.
4 Classification
4.1 Voltage ratings
The operating voltage of the fan is DC voltage, selected from the following values:
4.5 V, 6 V, 12 V, 15 V, 24 V, 28 V, 36 V, 48 V, 60 V and 110 V.
4.2 Designation rules
4.2.1 Type designation
The type designation of the fan consists of the following parts:
4.2.2 Fan size designation
The fan size designation is expressed by the millimetre dimension of the fan impeller outer diameter.
4.2.3 Product name code
The product name code consists of 3 to 4 uppercase Chinese Pinyin letters, as shown in Table 1.
4.2.4 Performance parameter code
For axial flow fans, the performance parameter code consists of 3 to 4 Arabic numerals, with a hyphen between the second and third digits. The first Arabic numeral indicates the voltage rating, with codes as shown in Table 2; the second Arabic numeral indicates the rotational speed, with codes as shown in Table 3; the third and fourth Arabic numerals indicate the axial length of the fan in millimetres. For centrifugal fans, the performance parameter code is specified in the product specific technical specification.
4.2.5 Example
100FZW23 08 indicates a basic type brushless DC axial flow fan with an impeller outer diameter of 100 mm, an operating voltage of 12 V, a benchmark speed of 3500 r/min to 4499 r/min, and an axial length of 8 mm.
4.3 Operating environmental conditions
The general operating environmental conditions for fans shall be selected according to Table 4 or the product specific technical specification.
5 Technical Requirements
5.1 Appearance
The surface of the fan shall be free from corrosion, peeling, dents and scratches. Fasteners shall be securely connected. A nameplate shall be affixed in a conspicuous position on the fan, shall not be detachable, and shall be clearly and correctly marked. The fan shall have the airflow direction and rotation direction marked on it.
5.2 External dimensions and mounting dimensions
Unless otherwise specified, the external dimensions and mounting dimensions of the fan shall comply with the provisions of Annex A.
5.3 Lead arrangement and marking
Fan power input shall be via lead wires, terminals or electrical connectors. The lead wire length shall not be less than 200 mm. The colour or marking shall comply with Table 5 or the product specific technical specification.
5.4 Airflow direction and rotation direction
The fan shall have markings for airflow direction and rotation direction on the housing or nameplate. The fan shall operate smoothly when energised, and the airflow direction and rotation direction shall correspond to the markings.
5.5 Benchmark speed
The benchmark speed of the fan shall comply with Annex B or the product specific technical specification.
5.6 Follow speed
The follow speed shall not be less than 90 % of the benchmark speed. After the low temperature test, the follow speed shall not be less than 80 % of the benchmark speed.
5.7 Starting current
When required, the starting current of the fan shall comply with the product specific technical specification.
5.8 Operating current
The operating current of the fan shall comply with Annex B or the product specific technical specification.
5.9 Insulation resistance
The insulation resistance between the lead ends and the casing of the fan shall comply with the following provisions:
a) At room temperature: insulation resistance shall not be less than 50 MΩ;
b) At high temperature: insulation resistance shall not be less than 10 MΩ;
c) Under damp heat conditions: insulation resistance shall not be less than 1 MΩ.
5.10 Dielectric strength
The manufacturer shall specify the dielectric strength of the fan. The space between the lead ends and the casing of the fan shall withstand the test voltage specified in Table 6 for a
