How does a circuit breaker differ from a fuse?

A circuit breaker is designed to interrupt the flow of electricity in the event of an overload or short circuit, protecting the electrical circuit and the devices connected to it. One significant feature of a circuit breaker is its ability to be reset without needing to replace any components. This means that after tripping due to an overload or other fault conditions, a breaker can be conveniently reset—usually by simply flipping a switch—allowing the circuit to resume its normal operation.

In contrast, a fuse operates differently; it contains a thin wire that melts and breaks the circuit when the current exceeds a certain level, thus preventing damage. Once a fuse has blown, it needs to be replaced entirely, which can be less convenient than resetting a circuit breaker. This distinction highlights the more user-friendly nature of circuit breakers, making them a popular choice in modern electrical systems.