Square D™ QO™ and QOB Miniature Circuit Breakers, QOB120DF, come in bolt-on mounted version and in a complete range of amperages and interrupting ranges to fit into various QO distribution panels. has dual funcion circuit breaker application. UL listed CSA certified This 1 pole QO circuit breaker is rated at 20A at 120VAC. This unit provides 10kA breaking capacity and bolt on mounting. A full line of features and factory installed accessories are also available such as shunt trips, auxiliary switches and alarm switches. This product includes a dual function feature with pigtail. This provides combination arc fault and ground fault protection. QO circuit breakers are UL Listed under UL File E84967 and are CSA Certified under CSA Master Contract 153555