Here's how it works:

* Weak Link: A fuse contains a thin wire made of a material with a low melting point. This wire acts as the weak link in the circuit.

* Overcurrent Protection: When an excessive amount of current flows through the circuit, the fuse wire heats up.

* Melting and Breaking the Circuit: If the current exceeds a predetermined limit, the fuse wire melts, breaking the circuit and preventing further current flow.

By breaking the circuit, the fuse protects the wiring and connected devices from damage caused by excessive current. This prevents electrical fires, equipment damage, and potential injuries.