A safety fuse is a protective device used in electrical circuits to prevent overloads and short circuits. It consists of a thin wire that melts when excessive current flows through it, breaking the circuit and stopping the flow of electricity. This helps to protect electrical appliances and wiring from damage and reduces the risk of fire. Safety fuses are commonly found in household appliances, vehicles, and industrial equipment. They come in various types and ratings, designed to handle specific current levels. When a fuse blows, it must be replaced to restore power, ensuring that the electrical system remains safe and functional.