State the main differences between fuse and circuit breaker

Fuse works on the electrical and thermal properties of the conducting materials. Circuit breaker works on t the Electromagnetism and switching principle.

Fuses can be used only once. Circuit breakers can be used a number of times.

A fuse is made up of a piece of metal that melts when overheated; a circuit breaker has an internal switch mechanism that is tripped by an unsafe surge of electricity. Fuses tend to be quicker to interrupt the flow of power, but must be replaced after they melt, while circuit breakers can usually simply be reset.