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 appliances and wiring from damage and reduces the risk of fire. When a safety fuse blows, it must be replaced to restore power. Fuses are commonly found in homes and industrial settings, ensuring that electrical systems operate safely. They are an essential component of electrical safety, working alongside devices like circuit breakers to provide reliable protection.