Gongfu Electronics is a company that focuses on the development, manufacture and supply of circuit protection components. It produces and sells: fuses (fuse cutouts), automotive plug-in fuses, automotive plug-in fuse holders, fork-bolt automotive fuses, automotive fuse boxes. Automotive fuses, fork-bolt automotive fuse holders, fuse holders, automotive fuse holders, providing safe and reliable circuit protection and comprehensive solutions for your products.
7H30L Series DC automobile fuse
1．Purpose and use
This series fuse is applicable to the rated DC voltage of 800V (750V) below, in the rated current of 50A-250A line, the breaking capacity is 50KA, widely used in the charger. Charging pile, vehicle-mounted battery, vehicle-mounted circuit system and integrated protection of inverter. At the same time, it has the characteristics of strong current limiting capacity, large breaking capacity, short circuit breaking speed and so on. It can withstand temperature shock, mechanical vibration shock, current shock, chemical load and so on. This series of products comply with ISO 8820, JASO D622 and GB/T31465 standards. Environmental reliability applicable standards :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（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
|
In:≥60A
|
|
min
|
max
|
min
|
max
|
|
1.1In
|
14400
|
-
|
14400
|
-
|
|
1.35In
|
150
|
3600
|
150
|
3600
|
|
1.5In
|
-
|
-
|
20
|
1500
|
|
2In
|
0.5
|
100
|
1
|
300
|
|
3In
|
0.1
|
15
|
0.2
|
30
|
|
5In
|
0.05
|
1
|
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）
|
|
Breaking Capacity
（KA）
|
|
Rated voltage
DC (V)
|
Maximum voltage drop
(mV)
|
|
1
|
7H30L50
|
50
|
800V/750V
|
200
|
50
|
|
2
|
7H30L60
|
60
|
800V/750V
|
180
|
50
|
|
3
|
7H30L70
|
70
|
800V/750V
|
180
|
50
|
|
4
|
7H30L80
|
80
|
800V/750V
|
180
|
50
|
|
5
|
7H30L100
|
100
|
800V/750V
|
180
|
50
|
|
6
|
7H30L125
|
125
|
800V/750V
|
180
|
50
|
|
7
|
7H30L150
|
150
|
800V/750V
|
180
|
50
|
|
8
|
7H30L175
|
175
|
800V/750V
|
180
|
50
|
|
9
|
7H30L200
|
200
|
800V/750V
|
180
|
50
|
|
10
|
7H30L225
|
225
|
800V/750V
|
180
|
50
|
|
11
|
7H30L250
|
250
|
800V/750V
|
180
|
50
|
