During normal circuit operation, how does the fuse link behave?

The fuse link behaves as a conductor during normal circuit operation. Its primary function is to allow electrical current to flow freely through the circuit until a fault condition arises, such as an overload or short circuit. In this state, the fuse link maintains a low resistance and facilitates the continuous operation of the electrical system.

When an overload condition occurs, the fuse link’s material is designed to melt at a specific temperature, breaking the circuit and stopping the flow of current. This protective feature is essential for preventing damage to wiring and connected devices, as well as reducing the risk of fire. Therefore, under normal conditions, it operates effectively as a conductor, enabling the correct performance of the circuit without interruption.