What does a fuse do in an electrical system?

A fuse serves a critical role in electrical systems by protecting circuits from damage caused by overload situations. When the current flowing through an electrical circuit exceeds a predetermined level, the fuse melts, or "blows," creating an open circuit. This action interrupts the flow of electricity, preventing overheating, potential fires, and damage to electrical components associated with excessive current levels.

This function is essential because it acts as a safety mechanism, ensuring that electrical systems operate within safe limits. Fuses are designed to handle specific maximum current ratings, making them effective at safeguarding the equipment and wiring from the potentially hazardous effects of overcurrent. By breaking the connection in such situations, fuses help maintain both the integrity of the electrical system and the safety of the environment in which it operates.