This is a circuit breaker designed to protect electrical circuits from overload or short-circuits. It features a magnetic-hydraulic delay mechanism, providing a time lag before the circuit is disconnected in the event of an issue. The device has a rating of 15 amps and can handle both alternating current (AC) at 277 volts and direct current (DC) at 80 volts. Its rocker panel mount design allows for easy installation on control panels or other equipment.