Square D,MINIATURE CIRCUIT BREAKER 120/240V 50A,1-Phase,10kA,120/240 Vac,1P,50A,Box Lugs #8 to #2 AWG(Al/Cu),Calibrated for use at 40 degrees C. See Data Bulletin 0100DB0101 for re-rating information.,Fiberglass filled thermoset molding material.,High Intensity Discharge Plug-On,Miniature Circuit Breaker,QO,not rated