What is the difference between a fuse and a circuit breaker?

The distinction between a fuse and a circuit breaker lies in their functionality and reset capability. A fuse is designed as a one-time safety device that provides overcurrent protection. When the current exceeds a certain level, the fuse element melts, breaking the circuit and stopping the flow of electricity. Once this occurs, the fuse must be replaced to restore electrical service, as it cannot be reused.

In contrast, a circuit breaker functions as a mechanical switch that automatically interrupts the current flow when an overload or short circuit occurs. Unlike a fuse, after a circuit breaker trips, it can be reset either manually or automatically, allowing for quick restoration of power without needing to replace any components.

Understanding this key distinction between the two devices is crucial for recognizing how they contribute to electrical safety in residential settings. Additionally, the options referring to specific protections or suggesting interchangeability do not accurately represent the fundamental differences in operation and usage between fuses and circuit breakers.