Description
2H38L Fast DC Fuse – 200A-500A 250V 300V Automatic Protection Fuse
Introduction to 2H38L Fast DC Fuse
With wide current range 200A to 500A and rated voltage 250V DC & 300V DC, it features automatic fusing response without manual operation, ideal for high-power DC equipment.
Product Specifications
- Model: 2H38L
- Current Rating: 200A, 250A, 300A, 350A, 400A, 450A, 500A
- Rated Voltage: 250V DC, 300V DC
- Characteristic: Fast-acting / Automatic fusing
- Type: Heavy duty DC protection fuse
- Structure: Ceramic tube, high breaking capacity
- Application: DC power system, automotive & industrial equipment
Core Features & Advantages
- Automatic fast fusing, quick cut off DC short-circuit current
- 200A-500A high current coverage for heavy load DC systems
- Stable performance under 250V / 300V DC working voltage
- Impact-resistant, heat-resistant, suitable for continuous long-time operation
- Automatic protection design, no manual reset required
- Compact structure, easy installation for high-power DC circuit layout
Application Scenarios
- New energy vehicle high current DC loop
- Industrial heavy-duty DC power supply equipment
- Energy storage DC distribution system
- 250V/300V DC battery pack protection
- Automotive engineering machinery DC circuits
- Renewable energy DC power distribution units
FAQ
A: 2H38L is an automatic fast DC fuse, used for 200A-500A high current DC overcurrent and short circuit protection.
A: Yes, it is an automatic fuse, it will break the circuit automatically when overcurrent occurs
2H38L Fast DC Fuse (200A–500A) 250V / 300V Automatic fuse
1. Purpose and Use
The 2H38L series fuse is suitable for rated DC voltage up to 250V (max 300V), and rated current from 200A to 500A. Breaking capacity: 10kA. It is widely used in chargers, power supplies, vehicle batteries, vehicle circuit systems, and inverter protection. It offers strong current limiting, large breaking capacity, and fast short-circuit response. It withstands temperature, mechanical, current, and chemical shocks. Standards: ISO 8820, JASO D622, GB/T31465.
2. Normal Working Conditions
Ambient temperature for operation: -5℃ to +40℃. Allowable conditions: -40℃ to +125℃.
3. Use Category
Full-range fast fuse (gR).
4. Structural Characteristics
The fuse tube is made of high-temperature ceramic material with strong hardness and flame retardancy. The melt is 99.99% pure silver with a variable cross-section, sealed in high-purity quartz sand and arc-extinguishing chemicals. Silver-plated contact surfaces ensure excellent conductivity and lower temperature rise. Both ends of the melt are spot-welded to the contacts for safe and reliable short-circuit fault interruption.
5. Agreed Current and Time
Note: Customer-specific agreed current/time values can be discussed.
| Test Current (A) | Fusing Time (s) | |
|---|---|---|
| Min | Max | |
| 1.1In | 14400 | – |
| 2In | 1 | 300 |
| 3In | 0.2 | 30 |
| 5In | 0.05 | 1 |
Note: Fuse characteristics vary with environment and application design. All values are rated at 25℃.
6. Main Parameters
| No. | Product Model | Rated Current (A) | Rated Voltage (DC) | Voltage Drop (110%) (mV) | Breaking Capacity (kA) |
|---|---|---|---|---|---|
| 1 | 2H38L200 | 200 | 300V / 250V | 113 | 10 |
| 2 | 2H38L250 | 250 | 300V / 250V | 105 | 10 |
| 3 | 2H38L300 | 300 | 300V / 250V | 102 | 10 |
| 4 | 2H38L350 | 350 | 300V / 250V | 97 | 10 |
| 5 | 2H38L400 | 400 | 300V / 250V | 88 | 10 |
| 6 | 2H38L450 | 450 | 300V / 250V | 95 | 10 |
| 7 | 2H38L500 | 500 | 300V / 250V | 77 | 10 |