Schneider Electric,SUPPLEMENTARY PROTECTOR 480Y/277V 40A 2P,10 kA,480Y/277 V at AC-120/240 V at AC-125 V at DC,2-Pole,40 A,480Y/277 V at AC-120/240 V at AC-125 V at DC,B,DIN Rail (35mm),Multi 9,Multi 9,circuit protection,UL 1077 Recognized, IEC 60947-2 Rated,miniature circuit-breaker