The most popular range in the STX series offering, the Surge-Trap® type 1 STXR meets requirements for UL1449 Fourth Edition and is ideal for the replacement of obsolete surge arrestors. The STXR series SPD feature TPMOV® technology inside making them the safest product available. With a small, compact design and line or load installation flexibility the STXR series is the perfect fit for branch panel and/or individual equipment protection. Mersen Surge-Trap® Surge Protective Device, Series: STXR, 120 VAC Electrical Rating, 50/60 Hz Frequency, 2 Wires, 200 kA Short Circuit, 50 kA Peak Surge Current, 20 kA Nominal Discharge, Modes of Protection: L-G/L-N/N-G, LED/Remote Audible Alarm Indicator, 1 ph, Environmental Conditions: -40 to 85 °C Operating Temperature, -40 to 85 °C Storage Temperature, NEMA 4X Enclosure, Panel Mounting, Pre-Wire Terminal, Aluminum/Polycarbonate, 3.35 in W x 3.35 in D Dimensions