Automobile Flat Blade Fuse is made of metal similar to solder, and its melting point is lower than that of the ordinary wire itself. The size of the conductor must be calibrated accurately so that when the rated current is reached, the conductor can be fused and the circuit can be disconnected with sufficient heat. The fuse has two important operating parameters, one is the operating voltage, and the other is the rated current. The vehicle owner should select the fuse according to the voltage and current in the circuit when purchasing or replacing it.