Square D,LOADCTR QO MB 240V 100A 1PH 12SP NEMA 1,#4 to 1 AWG(Al/Cu),1-Phase,100A,12,120/240 Vac,22kA,3-Wire,Combination Flush/Surface,Convertible Mains - Breaker,Designed to meet residential, commercial and industrial requirements to protect electrical systems, equipment and people.,Load Center,NEMA 1,QO,QO,UL Listed