What is the primary purpose of a fuse in electrical applications?

The primary purpose of a fuse in electrical applications is to protect circuits from overcurrent. A fuse is designed to act as a safety device that interrupts the flow of electric current when it exceeds a specific threshold. This interruption occurs because the fuse contains a metal wire or strip that melts when the current flowing through it exceeds its rated capacity, effectively disconnecting the circuit and preventing potential damage to electrical components or wiring from overheating or electrical fires.

By breaking the circuit in this way, fuses play a crucial role in safeguarding both devices and users from the dangers associated with overcurrent situations. The effectiveness of fuses is grounded in their ability to provide this protective barrier, thereby enhancing the overall safety of electrical systems.