Schneider Electric,SUPPLEMENTARY PROTECTOR 480Y/277V 40A 3P,10 kA,120/240 V at AC-480Y/277 V at AC,120/240 V at AC-480Y/277 V at AC,3-Pole,40 A,B,DIN Rail (35mm),Multi 9,Multi 9,circuit protection,UL 1077 Recognized, IEC 60947-2 Rated,miniature circuit-breaker