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

The difference between a fuse and a circuit breaker lies primarily in their functionality and operation. A fuse is designed as a one-time protective device that interrupts current flow when it experiences an overload or short circuit. When the fuse element melts due to excessive current, it needs to be replaced to restore the circuit's functionality.

In contrast, a circuit breaker is an electromechanical switch that can be reset after it has tripped due to an overload or short circuit. This means that once the issue is resolved, the circuit breaker can be easily toggled back to the "on" position, allowing normal operation to resume without needing a replacement part.

Understanding this fundamental difference between the two ensures that individuals can select the appropriate device for their specific applications in electrical systems.Recognizing that a fuse is a one-time, sacrificial component while a circuit breaker provides the convenience of being resettable greatly informs decisions regarding electrical safety and maintenance.