Square D,REVERSING STARTER 600VAC 135A NEMA,120VAC@60Hz - 110VAC@50Hz,135 A,3-Phase,3P,4,40HP@200VAC - 50HP@230VAC - 100HP@460/575VAC,600VAC,Box Lug,NEMA 1,Reversing Starter,S,UL Listed - CSA Certified,Used for Full-Voltage Reversing, Starting and Stopping of AC Squirrel Cage Motors,melting alloy 3