Any overcurrent protection device is responsible for protecting a circuit by opening up the device where the electrical current flows where a dangerous or excessive temperature may raise. Most of these devices will respond to short-circuit or ground-fault current values in overload conditions.
Some types of overcurrent protection devices include circuit breakers, which is designed to protect the circuit from damage. It detects a fault condition and will interrupt current flow.
Another type of overcurrent protection device is a fuse, which operates only once and then must be replaced. The circuit breaker can be reset either automatically or manually in order to resume normal operation in the home. Circuit breakers also come in a variety of sizes.
Another type of overcurrent protection device is a polyswitch device which will protect against damage that is caused by over temperature faults and overcurrent surges. This type of device limits the amount of flow of high current and resets after a fault is cleared.