The HUBBELL GFSMCB120232P is a hydraulic magnetic circuit breaker that provides ground fault protection by interrupting the load through a shunt trip coil. It is designed for applications requiring sensitive ground fault detection and rapid response. The breaker's trip level is 4-6mA, with a trip time of 0.025 seconds, operating at a frequency of 60Hz. It can withstand a maximum humidity of 0.95 and an operating temperature range of -30 to 150°F (-30 to 66°C).