Additional Information

The fuse is a one-time protection device that utilizes the melting of a metal element under overcurrent conditions to break the circuit. When the current exceeds the rated value and persists for a sufficient duration, the element heats up due to Joule heating, reaches its melting point, vaporizes, and disconnects, thereby providing overcurrent and short-circuit protection. Based on the fusing characteristics, fuses are classified into fast-acting types and slow-blow (time-delay) types. Selection should consider parameters such as rated current, rated voltage, breaking capacity, and I²t value, matching the surge characteristics of different loads.