Square D,SWITCH FUSIBLE HD 30A 4P NEMA4,4X,5 STAINLESS,30 A,4,4, 4X, 5,600V 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 3/3R/4/4X/12,Safety Switch,UL 98 Listed,Y,surface