Which device is commonly used for overcurrent protection?

The device commonly used for overcurrent protection is a circuit breaker. Circuit breakers are designed to automatically interrupt the flow of electrical current in a circuit when it detects an overcurrent condition, which can be caused by overloads or short circuits. This interruption helps prevent damage to electrical components and reduces the risk of fires or equipment failure.

Circuit breakers serve as a critical component in safeguarding electrical systems. They provide a resettable means of protection, allowing the circuit to be restored to function after the fault condition has been corrected. Unlike other components such as transformers, resistors, and capacitors, which serve different primary functions in electrical systems, circuit breakers specifically address the need for overcurrent protection, making them essential for maintaining safety in electrical installations.