Axial Leaded Alloy Thermal Fuse uses a metal conductor as a melt in series in an electric circuit. When overload or short circuit current passes through the melt, it is fused due to its own heat, so as to cut off the circuit. Fuses are simple in structure and easy to use. They are widely used as protective devices in power systems, various electrical equipment and household appliances.
Fuses can be divided into high voltage fuses and low voltage fuses according to the voltage used. According to the protection object, it can be divided into fuses for protecting transformers and general electrical equipment, fuses for protecting voltage transformers, fuses for protecting power capacitors, fuses for protecting semiconductor components, fuses for protecting motors and fuses for protecting household appliances, etc. According to the structure, it can be divided into open type, semi-closed type, tube type and jet type fuse.