The certification execution standard system for fuses is diversified according to different application fields and regional market requirements, mainly covering scenarios such as automotive electronics, intrinsic safety equipment, general electronics, and specific industry applications. The following is a classification analysis and key points of the core certification standards:
1、 Automotive electronics field: AECQ200 standard
Core requirement: The AECQ200 Rev E, released in 2023, will include fuses in the vehicle certification system for the first time, requiring them to pass rigorous reliability testing.
Environmental reliability testing: high and low temperature storage (55 ° C to+150 ° C), temperature cycling, humidity durability (95% RH), etc.
Physical property testing: mechanical impact (50G), vibration, terminal strength, flammability (UL94 V0 flame retardant).
Typical products: such as Littelfuse's 823A series (1000Vdc high-voltage fuse) and 885 series (500V/100A high current fuse), both certified for use in battery management systems (BMS), car chargers, etc.
Meaning: To ensure the reliable breaking of fuses in environments such as car vibration and extreme temperatures, and to prevent circuit failures from causing safety accidents.
2、 Intrinsic safety equipment: UL 913 standard
Applicable scenarios: For flammable and explosive environments such as oil, natural gas, and chemicals, fuses are required to block heat and sparks.
Key design:
Airtight packaging: prevents internal arcs from igniting external gases/dust (e.g. PICO 259 series is suitable for 125V, PICO 305 series supports 277V).
High breaking capacity: 1500A breaking current, ensuring quick melting in case of short circuit.
Global compatibility: Simultaneously meets regional explosion-proof certifications such as ATEx and IECEx.
3、 International standard: IEC system
IEC 60127 series
Covering universal module fuses (UMF), such as 464/465 series surface mount fuses, requiring breaking capacity（ 100A@250VAC ）Temperature range (55 ° C to+125 ° C).
Subdivision types: including fast break (FF), slow break (TT) and other time current characteristic classifications.
IEC 60269 series
For industrial power fuses, such as gPV grade fuses (Bourns POWrFuse series) used in photovoltaic applications, high breaking capacity (150kA) and wide temperature operation (55 ° C to+125 ° C) are required.
4、 Regional security certification
China 3C Certification (Compulsory Certification)
According to the standard GB 9816.12013, thermal fuses for indoor electronic equipment are covered.
Scope: AC voltage ≤ 660V, current ≤ 63A, subject to type testing and factory review.
North American UL standards
UL 248: focuses on fire risk control, requiring fuses to have no open flames or molten droplets when overloaded (such as 235 series glass tube fuses).
UL 24819: Specially designed for photovoltaic systems (gPV class), such as the Bourns PFE series (1000VDC/20kA disconnect).
EU CE certification
Must comply with IEC standards and the European Low Voltage Directive (LVD), such as the EN 60127 series.
5、 Specific application standards
Photovoltaic system: It needs to meet both UL 24819 (North America) and IEC 602696 (International) gPV level requirements, emphasizing low overload fault current protection and high environmental adaptability.
Industrial power supply: such as UL 508/IEC 60947, focusing on breaking capacity and durability testing.
Comparison of main certification standards for fuses
The following table summarizes the differences in key certification standards:
|Standard Name | Applicable Fields/Regions | Core Test Content | Typical Application Scenarios|
|AECQ200 Rev E | Global Automotive Electronics | Temperature Cycling, Mechanical Shock, Vibration Testing | Electric Vehicle BMS, Onboard Charger|
|UL 913 | Flammable and Explosive Hazardous Environments | Airtight Packaging, Spark Barrier Testing | Petroleum and Natural Gas Equipment, Chemical Sensors|
|IEC 60127 | General electronic equipment (international) | Testing of breaking capacity, time current characteristics | Consumer electronics, industrial control boards|
|GB 9816.1 (3C) | Chinese Domestic Market | Type Testing, Factory Review | Indoor Electrical and Electronic Equipment Components|
|UL 248/IEC 60269 | Photovoltaic/Power Systems | High Breaking Capacity, Temperature Adaptability Testing | Solar Inverters, Battery Management Systems|
Conclusion: Selection Suggestions
Automotive Electronics: Preferred AECQ200 certified products (such as 823A series).
Dangerous environment: Use UL 913 certified sealed fuses (such as PICO 305 series).
Photovoltaic/Industrial: Compatible with gPV grade (UL 24819/IEC 602696) or high breaking capacity models.
Chinese market access: Mandatory requirement for 3C certification, with attention to GB 9816.1 testing items.
The selection of certification standards should be based on the voltage, current, environmental risks, and regional regulations of specific application scenarios. The mandatory certification requirements of the target market should be confirmed in the early stages of design to avoid the cost of later rectification.
