Surge-Trap® modular surge protective device (SPD) is a no fuse, fail safe surge suppressor featuring MERSEN's patented TPMOV® technology inside. UL 1449 4th Edition approved, it is DIN rail mountable featuring a fail safe self-protected design, visual indicator, and a small footprint. A remote indicator option provides status to critical control circuitry. The Surge-Trap modular SPD has a high short circuit rating and a thermally protected MOV, which eliminates the need for additional overcurrent protection devices. Mersen Surge-Trap® Surge Protective Device, Split Phase, Series: ST Series, 120 VAC Electrical Rating, 50/60 Hz Frequency, 2 Pole, 3 Wires, 200 kA Short Circuit, 50 kA Peak Surge Current, 20 kA Nominal Discharge, Modes of Protection: L-N/L-G/L-L, 25 ns Response, Microswitch Indicator, Environmental Conditions: -40 to 85 °C Operating Temperature, -40 to 85 °C Storage Temperature, IP20 Enclosure, DIN Rail Mounting, Box Terminal, Polyethylene Terephthalate, 3.58 in L x 2.7 in W x 1.4 in D Dimensions