Hubbell GFSMCB120231P circuit breaker. For use in conjunction with a Hubbell GFCI sensing module; not for other use. GFCI sensing modules utilize a shunt trip coil and are typically used for portable and vehicle mounted generators. Rated 23A 120VAC 1-pole single phase. We have included a typical schematic for the product line to give some indication of the application (please note this may not be the exact wiring diagram for this particular item).
