Product DescriptionYour One Source QO120CP 20-Amp 1-Pole Plug-On Circuit BreakerFrom the ManufacturerFull size 3/4" breakers, 120/240 Volts ac; 10,000 AIR. U.L. Listed as HACR type for use with equipment having motor group combinations and marked for HACR breakers. 15 and 20 amp breakers are also U.L. Listed for switching 120 Volt ac fluorescent lightingloads.