The Square D™ by Schneider Electric brand Heavy Duty Safety Switch is designed to be tough, reliable and provide exceptional performance in the most grueling conditions. They have been designed to have a significantly higher durability than a standard switch and have a durability three times greater than NEMA standard. All heavy duty safety switches feature a quick-make, quick-break operating mechanism, a dual cover interlock and a color-coded indicator handle. Heavy duty switches are the ideal for your electrical disconnect and protection for all your commercial and industrial needs. This is a two pole fusible heavy duty safety switch that is rated at 400A with voltage of 240VAC and 250VDC. This switch is rated at 50hp for 3 phase with standard fuses. For time delay fuses, this switch is rated at 125hp at 3 phase. For 250VDC, it also is rated at 50hp This unit includes a factory installed neutral. It is UL listed with the file E2875.