What are the certification standards for fuses?

Comprehensive analysis of the certification execution standards for fuses
The certification standards for fuses vary by region, application area, and product type, but the core revolves around electrical safety, mechanical reliability, and environmental adaptability. The following are the classifications and detailed explanations of the main standards:
1、 International General Standards
1. UL standards (US/North America)
Standard number: UL 248 series
Scope of application: Safety and performance requirements for low-voltage fuses in the North American market.
Key sub criteria:
UL 248-1: Basic requirements, defining general terms, testing methods, and environmental adaptability (such as temperature rise, moisture resistance) for fuses.
UL 248-14: For small current fuses (such as ATC/ATO series for automobiles).
UL 248-13: Semiconductor fuses for high voltage direct current (HVDC) applications, suitable for electric vehicles and energy storage systems.
Certification Mark:
UL Listed: Fully compliant with standards, UL logo can be affixed.
UL Recognized: Partially compliant with standards and needs to be used in conjunction with other certifications.
2. IEC standards (international)
Standard number: IEC 60269 series
Scope of application: Unified standard for global low-voltage fuses.
Key sub criteria:
IEC 60269-1: Basic requirements, definition of fuse terms, classification, and general testing methods.
IEC 60269-2: Low voltage fuses for industrial use, emphasizing high breaking capacity (such as motor protection).
IEC 60269-3: Ultra small fuses (such as for printed circuit boards), specifying dimensions and electrical performance.
IEC 60269-4: Semiconductor protection fuses require fast response (<1ms) and low power consumption.
IEC 60269-6: Dedicated for photovoltaic systems, requiring DC short-circuit testing and weather resistance (such as UV and high temperature).
Certification marks: CE (EU), SEMKO (Sweden), BSI (UK), etc.
2、 Regional standards
1. China (GB)
Standard number: GB/T 9364 series
Corresponding international standard: IEC 60127 (miniature fuses).
Key sub criteria:
GB/T 9364.2-2018: Tubular fuses, with specified dimensions (e.g. 5mm × 20mm) and breaking capacity (e.g. 1500A).
GB/T 9364.3-2018: Ultra small fuse links (such as square and circular), suitable for printed circuit boards.
GB/T 9364.4-2016: Universal Modular Fuse (UMF), specifies the rated current range (e.g. 32mA to 10A).
Certification mark: CCC (China Compulsory Certification).
2. Europe (EN)
Standard number: EN 60127 series
Corresponding international standard: IEC 60127.
Key sub criteria:
EN 60127-6:2003: Supporting components for small fuses, specifying installation dimensions and electrical clearances.
Certification requirements: CE certification must comply with EN standards and be affixed with the CE mark to enter the EU market.
3. Japan (JIS)
Standard number: JIS C 6575
Scope of application: Small current fuses in Japan.
Content: Similar to UL/IEC standards, but adjusted testing conditions (such as temperature rise limits) for the Japanese market.
Certification mark: Japanese electrical safety mark (such as PSE).
3、 Special application field standards
1. Automotive field
ISO standard:
ISO 8820: Road vehicle fuses, ensuring the safety of automotive circuits, covering both AC and DC systems.
ISO 26262: Functional safety standard that requires fuses to respond quickly in extreme operating conditions (such as short circuits) to prevent system level failures.
Japanese standard:
JASO-D622: High voltage DC fuse for electric/hybrid vehicles, with specified withstand voltage (such as 450V DC) and breaking capacity (such as 50kA).
Automotive Quality System:
IATF 16949: Manufacturers are required to have a comprehensive quality management system to ensure the reliability of fuses.
2. Semiconductor protection
IEC 60269-4: Semiconductor fuses are required to meet the requirements of fast response (<1ms) and low power consumption, and are suitable for devices such as inverters and rectifiers.
UL 248-13: Covering high-voltage DC semiconductor fuses, emphasizing overcurrent protection and material high temperature resistance.
3. In the field of new energy
Photovoltaic system:
IEC 60269-6: Fuses are required to have DC short-circuit protection capability and pass weather resistance tests (such as -40 ℃ to 85 ℃ cycling).
Energy storage system:
UL 248-13: For fuses used in battery management systems (BMS), high voltage resistance (such as 1000V DC) and long lifespan (>20 years) are specified.
4、 Testing and Certification Requirements
1. Core testing items
Electrical performance:
Rated current/voltage verification (e.g. 10A/250V).
Breaking ability test (simulating short circuit, such as 1500A/240V AC).
Temperature rise test (temperature rise<50K under full load).
Mechanical properties:
Insertion and extraction force test (e.g. automotive fuses require>50N).
Vibration/shock adaptability (such as industrial fuses requiring 10g vibration).
Durability:
Overload cycle life (e.g. 1000 times 1.5 times rated current surge).
Material safety:
Flame retardant rating (UL 94 V-0/V-2).
Environmental compliance (RoHS/REACH, limiting harmful substances such as lead and mercury).
2. Certification process
Submit technical documents: including product specifications, design drawings, and test reports.
Sample testing: Send samples to the laboratory (such as UL, TUV, CQC).
Rectification and optimization: Adjust the design based on test results (such as improving materials or structures).
Certificate issuance: Upon passing, obtain certification marks (such as CE, UL, TUV), and the certificate is usually valid for 5 years.
5、 Summary
The certification standards for fuses need to be selected based on the target market and application areas:
North American market: Prioritize UL 248 series and affix UL logo.
European market: Must comply with EN 60127 and affix CE mark.
Automotive field: ISO 8820/JASO-D622+IATF 16949.
In the field of new energy: IEC 60269-6 (photovoltaics)+UL 248-13 (energy storage).
Through compliance certification, it can ensure that fuses meet global requirements in terms of safety, performance, and environmental protection, reducing market access risks.