A drop-out fuse functions by breaking an electrical circuit when the current flowing through it exceeds a predefined threshold. This threshold is determined by the fuse’s current rating, which is typically expressed in amperes. When an overcurrent or short-circuit situation occurs, the fuse element within the device melts, disconnecting the circuit and preventing further damage to the electrical system.
Drop-out fuses are designed to be sensitive to both overcurrent and temperature changes. In the event of a sustained overcurrent, the fuse element’s temperature will rise, causing it to melt and break the circuit. Additionally, these fuses are designed to respond to rapid temperature changes, such as those caused by a sudden short circuit, ensuring swift protection for the electrical system.