2H38L Fast DC Fuse | 200A-500A 250V 300V Automatic Fuse
2H38L bolt‑mount ceramic DC fuse 200‑500A,250‑300Vdc,10kA breaking capacity,ISO8820 JASO D622 for EV charger,vehicle battery & inverter protection.
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2H38L Series DC Automobile Fuse gR Full‑Range Fast‑Acting Ceramic Cartridge Fuse for EV, Charger, Battery & Inverter Systems
Product Overview
The 2H38L is a DC fuse designed as a bolt-mount ceramic fast fuse for EV charger, vehicle battery and inverter protection. This fuse supports 200-500A at 250-300V DC with 10kA breaking capacity.
,2H38L series is gR full‑range fast‑acting bolt‑on ceramic cartridge DC automobile fuse. It is designed for circuits up to 250‑300V DC with rated current from 200A to 500A and breaking capacity up to 10kA. Widely applied for charger, power supply, on‑board battery, vehicle circuit and inverter integrated over‑current & short‑circuit protection.
This fuse delivers strong current‑limiting performance, high breaking‑capacity and fast short‑circuit tripping speed. It resists temperature shock, mechanical shock, current surge and chemical load. Compliant with ISO 8820‑8, JASO D622, GB/T31465.6, UL248‑20.
The fuse body adopts high‑temperature‑resistant high‑hardness ceramic tube. 99.99% pure silver variable‑cross‑section melt is sealed inside, filled with high‑purity quartz‑sand arc‑extinguishing medium. Silver‑plated contact surfaces lower temperature rise and power consumption. Melt‑to‑contact spot‑weld connection greatly improves short‑circuit breaking safety and reliability.
Key Features
- ✅ Fuse Class: gR full‑range fast‑acting fuse
- ✅ Compliance: ISO 8820‑8, JASO D622, GB/T31465.6, UL248‑20
- ✅ Housing: High‑temperature‑resistant high‑strength ceramic cartridge
- ✅ Melt: 99.99% pure silver variable‑cross‑section element, quartz‑sand arc‑extinguishing filling
- ✅ Contact surface: Silver‑plated for low‑temperature‑rise & low‑power‑loss performance
- ✅ Breaking capacity: 10kA
- ✅ Rated voltage: 250V / 300V DC
- ✅ Rated current range: 200A‑500A
- ✅ Operating environment: Normal ‑5℃ ~ +40℃; allowable ‑40℃ ~ +125℃
- ✅ Excellent resistance against temperature shock, mechanical shock, current surge and chemical load
- ✅ Bolt‑mount design for vehicle‑grade heavy‑duty DC systems
Agreed Current‑Time Characteristics
| Test current A | Fusing time s | |
| In:≥60A | ||
| min | max | |
| 1.1In | 14400 | – |
| 1.35In | 150 | 3600 |
| 1.5In | 20 | 1500 |
| 2In | 1 | 300 |
| 3In | 0.2 | 30 |
| 5In | 0.05 | 1 |
Note: Custom agreed current‑time parameters are negotiable upon request. Performance data tested under 25℃ constant ambient temperature. Fuse characteristics will vary with actual operating environment and surrounding design requirements. Refer to attached time‑current characteristic curve for complete performance reference.
Electrical Ratings
| NO: | Product model | Rated current （A） | Breaking Capacity （KA） | ||
| Rated voltage DC (V) | Maximum voltage drop (mV) | ||||
| 1 | 2H38L200 | 200 | 300V/250V | 180 | 10 |
| 2 | 2H38L250 | 250 | 300V/250V | 180 | 10 |
| 3 | 2H38L300 | 300 | 300V/250V | 160 | 10 |
| 4 | 2H38L350 | 350 | 300V/250V | 160 | 10 |
| 5 | 2H38L400 | 400 | 300V/250V | 160 | 10 |
| 6 | 2H38L450 | 450 | 300V/250V | 150 | 10 |
| 7 | 2H38L500 | 500 | 300V/250V | 150 | 10 |
Typical Applications
‑ EV charger & charging‑pile short‑circuit and over‑current protection ‑ On‑board power supply and vehicle‑mounted battery system protection ‑ Automotive / new‑energy vehicle main DC circuit protection ‑ Inverter and converter integrated protection ‑ Energy‑storage battery‑bank DC protection ‑ Heavy‑duty 250‑300V DC industrial power equipment
Installation Notes
- Adopt bolt‑on mounting mode, ensure reliable tightening to keep good contact; poor contact will cause abnormal temperature‑rise.
- Designed exclusively for DC circuits. Do not apply to AC power systems.
- This is gR full‑range fast fuse, select proper ampere rating according to actual continuous load current.
- Product performance will be affected by ambient temperature, shock, vibration and system design. Confirm specifications with technicians for special‑condition projects.
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Frequently Asked Questions
1: What voltage and current does 2H38L series support?
A: Rated for 250V / 300V DC, current range 200‑500A, breaking‑capacity up to 10kA, gR full‑range fast‑acting fuse.
2: What is the operating temperature range?
A: Normal operating ambient ‑5℃ ~ +40℃; allowable extreme operating range:‑40℃ ~ +125℃.
3: What standards does 2H38L comply with?
A: Meets ISO 8820‑8, JASO D622, GB/T31465.6, UL248‑20 automotive fuse standards.
4: Can 2H38L be used for EV charger and energy‑storage battery systems?
A: Yes, this gR ceramic fast fuse is widely used for EV charger,on‑board battery,inverter and energy‑storage DC circuit protection.
5: Do you support custom time‑current parameters and OEM marking?
A: Yes, custom fuse characteristic parameters and OEM custom marking are negotiable, please submit inquiry.
Inquiry Information
Submit your inquiry for MOQ confirmation, sample requests, OEM custom‑marking and volume pricing. Fill web contact form or send email for formal quotation and technical documentation support.
