Fuse is an important component in the circuit, which can effectively protect the circuit from damage caused by overload current. Fuses made of low melting point metals when the current is too high, cutting off the circuit and providing protection. Once the fuse is blown, it needs to be manually replaced to restore the normal operation of the circuit. This simple and effective design makes the fuse an indispensable part of the circuit, ensuring the safe and stable operation of electrical equipment and circuit systems.