This is a circuit breaker designed to automatically interrupt the electrical supply in case of an overload or short-circuit. It has a magnetic and hydraulic delay mechanism, making it suitable for applications that require a high level of safety and reliability. The device operates at 20 amperes with a 277-volt AC and 80-volt DC voltage rating, making it compatible with a variety of electrical systems. It is mounted on a rocker panel, providing easy access for switching the circuit on or off.