Square D,SW FUSIBLE HD 240V 600A 2P NO KO NEMA12,12, 3R,2,240 V AC, 250 V DC,600 A,Heavy Duty,Heavy Duty Safety Switches are designed for the following applications up to 600Vac or 600Vdc 30-1200 amperes, 200,000 rms symmetrical amperes short circuit current.,NEMA 3R/12,Safety Switch,UL 98 Listed,Y,surface