What is typically used to prevent overcurrents in electrical circuits?

A fuse is a vital component in electrical circuits designed specifically to prevent overcurrents. It serves as a safety device that interrupts the circuit when excessive current flows through it, thereby protecting electrical devices and wiring from damage that could occur due to overheating or burning.

The fuse works by containing a wire or metal strip that melts when the current exceeds a specified level, breaking the circuit and stopping the flow of electricity. This automatic disconnection helps to prevent potential fires and equipment failure.

In contrast, while surge protectors also provide a level of protection for electrical devices, they primarily guard against voltage spikes rather than sustained overcurrents. Capacitors and resistors, on the other hand, serve different functions in circuits such as energy storage and controlling current flow rather than specifically preventing overcurrents.