A fuse and circuit breaker both of them protect an overloaded circuit by disrupting the current continuity. The way they disrupt the current flow is dissimilar. A fuse is a simple piece of metal that melts down when overheated because of excessive flow of current whereas a circuit breaker has switching mechanism that is activated when unsafe current flows through the circuit. Fuses are faster to disrupt the current flow but they must be replaced after a piece of metal melts down, whereas circuit breakers can be reset and used multiple times.
The most significant distinguishing factor between fuse and circuit breaker lies in their operational mechanism. The fuse functions at the base of thermal as well as electrical characteristics of the conducting metal which is utilized in the fuse, whilst a circuit breaker functions on the base of electro-mechanical principles.
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Herein main differences between Fuse and Circuit breaker are discussed on the basis of practical factors such as their Functionality, Operation Time & Mode, Breaking Capacity, Representation, Temperature Effects, and Applications.The following table covers the key Differences between Fuse and Circuit Breaker.