What is the primary function of a fuse?

The primary function of a fuse is to protect circuits by breaking the connection if the current exceeds a predetermined level. This is essential for ensuring safety in electrical systems. Fuses are designed to melt and disconnect the circuit when the current flowing through them surpasses their rated capacity, which prevents overheating and potential fire hazards.

By interrupting the flow of electricity, fuses protect not just the wiring and connected devices from damage due to excess current, but also help to maintain overall circuit integrity. This protective mechanism is crucial in safeguarding electrical systems from faults that could lead to severe accidents or equipment failure. The design of the fuse allows it to act quickly and effectively, making it a simple yet vital component for electrical safety.