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

Fuses and circuit breakers, while both designed to interrupt the flow of electricity, operate through different mechanisms, leading to variations in protection, speed of response, expense, and application.

Fuses typically consist of a metal wire or filament encased in ceramic or glass, allowing electricity to pass until an overload occurs, causing the filament to melt and interrupt the flow.

Circuit breakers operate through electromagnets or bi-metal strips, breaking the current when unsafe levels are detected.

While fuses offer quicker interruption due to the speed of the melting process, they need replacement afterward. Circuit breakers can be reset, providing convenience.

In terms of protection, fuses guard against overloads, while circuit breakers protect against overloads and short circuits, offering better surge protection. However, circuit breakers can be more expensive to install and may take longer to respond to surges.

The choice between fuses and circuit breakers depends on factors like voltage, current, and equipment type. Ultimately, the decision is best left to qualified electricians who consider the specific needs and characteristics of the property.