Square D,SW FUSIBLE HD 600V 600A 2P NEMA12 NO KO,12, 3R,2,600A,600V AC600V DC,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,Rainproof, Sleet/Ice proof and Dust tight (Indoor/Outdoor),Safety Switch,UL 98 Listed,Y