What is auto fuse link:
Auto Fuse links, long insert square connection type car fuse 20A 30A 40A 50A 60A 70A 80A 100A high quality Automotive Fuses box J shell, FBelec Car square fuse insert, FBelec fusible link is a short and long piece of low voltage wire in the car's wiring harness that acts as a fuse. It cab provide circuit protection in a auto's wiring.
1. When the normal working current operates at 25 ℃, the current rating of the fuse shall be reduced by 25% to avoid harmful fusing. Most traditional fuses use materials with low melting temperatures. Therefore, this kind of fuse is sensitive to the change of ambient temperature. For example, a fuse with a current rating of 10A is generally not recommended to operate at an ambient temperature of 25 ℃ at a current greater than 7.5A.
2. Voltage rating the voltage rating of the fuse must be equal to or greater than the effective circuit voltage. The general standard voltage rating series are 32V, 125V, 250V and 600V.
3. The resistance of resistance fuse is not important in the whole circuit. Since the resistance of fuses with amperage less than 1 is only a few ohms, this problem should be considered when using fuses in low-voltage circuits. Most fuses are made of materials with positive temperature coefficient. Therefore, there are cold resistance and thermal resistance.
4. The current carrying capacity of the ambient temperature fuse is tested at an ambient temperature of 25 ℃, which is affected by the change of ambient temperature. The higher the ambient temperature, the higher the working temperature of the fuse and the shorter its service life. On the contrary, operating at a lower temperature will prolong the life of the fuse.
5. Rated fusing capacity is also called breaking capacity. The rated fusing capacity is the maximum allowable current that the fuse can indeed fuse under the rated voltage. In case of short circuit, the instantaneous overload current greater than the normal working current will pass through the fuse for many times. Safe operation requires fuses to remain intact (without bursting or breaking) and eliminate short circuits.
