Drop-out fuse cut our, also known as a fuse switch, is a safety device used for circuit protection. It usually consists of fuse link and fuse holder to automatically cut off the circuit when the current is overloaded to prevent overheating and fire. Drop-out fuses can be installed in circuits to protect electrical equipment and circuits from overloads and short circuits. When selecting a drop-out fuse, you need to consider factors such as the rated voltage, rated current, and breaking capacity of the circuit to ensure that the appropriate model is selected to protect the circuit.