描述
7H38L high speed fuse (300A-400A) 750V800V Automotive fuse manufacturer
1. 7H38L Series DC automobile fuse
This series fuse is applicable to the rated DC voltage of 800V (750V) below, in the rated current of 300A–400A line. The breaking capacity is 20KA, widely used in the charger, charging pile, vehicle-mounted battery, vehicle-mounted circuit system and integrated protection of inverter. It has characteristics such as strong current limiting capacity, large breaking capacity, fast short circuit breaking speed, and resistance to temperature shock, mechanical vibration, current shock, and chemical load. This series complies with ISO 8820, JASO D622, GB/T31465, GB/T31465.6, ISO 8820-8, and UL248-20 standards.
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 (gR)
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.
评价
目前还没有评价