Description
5H38L EV/HEV High Voltage DC Automotive Fuse – 300A–500A 450V/500V
Overview of 5H38L Automotive Fuse
Covering current range 300A to 500A and rated voltage 450V DC / 500V DC, it features fast-acting performance to handle severe short-circuit faults in high-voltage automotive DC circuits.
Product Specifications
- Model: 5H38L
- Current Rating: 300A, 350A, 400A, 450A, 500A
- Rated Voltage: 450V DC, 500V DC
- Application: EV / HEV High Voltage DC System
- Characteristic: Fast-acting high voltage DC protection
- Structure: High-strength ceramic tube, automotive grade anti-vibration
- Compliance: Automotive IEC & UL fuse safety standards
Core Advantages
- 300A-500A high current design for high-power EV main circuit
- Matches 450V/500V mainstream new energy high voltage platform
- Ultra-fast cutoff speed, protects vehicle battery and inverter modules
- Automotive-grade shock and vibration resistance for driving conditions
- High heat resistance, stable performance under continuous high load
Application Scenarios
- Electric vehicle main high-voltage DC circuit
- Hybrid EV HEV power distribution system
- Large energy storage BESS high current DC loop
- Commercial new energy vehicles & engineering EV equipment
- High-power 500V DC industrial power systems
FAQ
A: 5H38L is EV/HEV high voltage DC automotive fuse, used for 300A-500A high current short circuit protection.
A: Yes, specially designed for both pure electric EV and hybrid HEV high voltage DC protection.
5H38L EV/HEV High Voltage DC Automotive Fuse 300A–500A 450V/500V
Full Product Description
Key Features
- Current Range: 300A – 500A
- Voltage Rating: 450V DC / 500V DC
- aR fast-acting semiconductor protection type
- Excellent current-limiting performance and low I²T
- High breaking capacity and reliable protection
- High-strength flame-retardant ceramic housing
- High conductivity, low power loss and low heat generation
- Bolt‑down mounting for stable and firm connection
- Anti-vibration and shock resistance for automotive use
- Wide operating temperature range
- RoHS compliant, suitable for EV/HEV systems
Applications
- Electric vehicle (EV) power battery system
- Hybrid electric vehicle (HEV) power circuit
- Vehicle motor controller and inverter
- On-board charger (OBC)
- High-voltage power distribution box (PDU)
- EV DC/DC converter
- Automotive high-voltage wiring and distribution
- New energy vehicle electronic control system
Why Choose EssFuse?
1. 5H38L Series DC automobile fuse
This series of fuses are suitable for rated DC voltage up to 500V (450V). In the line with rated current up to 500A, the breaking capacity is 50kA, which is the comprehensive protection of on-board battery, on-board line system and inverter. It has the characteristics of strong current limiting capacity, high breaking capacity, fast short-circuit breaking speed, and can withstand temperature shock, mechanical vibration shock, current shock, and chemical load. This series conforms to ISO 8820, JASO D622 and GB/T31465. Applicable standards for environmental reliability: GB/T31465.6, ISO 8820-8, JASO D622, UL248-20
2. Normal working conditions
Normal operating conditions of ambient air temperature: -5 ℃ ~ 40 ℃; allowable operating conditions: -40 ℃ ~ +125 ℃;
3. Use category
Full range fast fuse
4. Structural characteristics
The melting tube of the product is made of high-temperature resistant ceramic material, with high flame-retardant performance and strong hardness.
The melt is sealed in the melting tube with a variable cross-section melt made of 99.99% pure silver. The melting tube is filled with chemically treated high-purity quartz sand and specially treated chemical materials as arc extinguishing medium. The contact surface is silver plated to ensure reliable electrical performance, greatly reducing temperature rise and power consumption; both ends of the melt are firmly connected with the contact by spot welding, which greatly enhances the safety and reliability of breaking short circuit fault current.
5. Agreed current and agreed time
| 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: the agreed current and agreed time required by the customer can be negotiated with our company.
The characteristics of fuse will vary according to the use environment and surrounding design requirements. The performance characteristics are obtained according to the rated constant temperature of 25 ℃.
6. Main parameters
| No | Product Model | Rated Current (A) | Rated Voltage DC (V) | Max Voltage Drop (mV) | Breaking Capacity (KA) |
|---|---|---|---|---|---|
| 1 | 5H38L300 | 300 | 500V/450V | 130 | 50 |
| 2 | 5H38L350 | 350 | 500V/450V | 130 | 50 |
| 3 | 5H38L400 | 400 | 500V/450V | 130 | 50 |
| 4 | 5H38L450 | 450 | 500V/450V | 110 | 50 |
| 5 | 5H38L500 | 500 | 500V/450V | 110 | 50 |