Fail-safe and Economical Power-related problems cost U.S. companies more than $80 billion a year, driving up maintenance and production costs, causing production delays, lost sales, late deliveries, as well as increased spoilage and scrap. Mersens Surge-Trap® surge protective device with TPMOV® technology inside helps minimize power-related problems by protecting sensitive electrical equipment from harmful transients. It offers fail-safe overvoltage protection that meets the latest UL 1449 Third Edition standard. Best of all, it will save you money because it does not require coordinated fusing or the expense of additional fuses, fuse holders or wiring in meeting the UL standard. The Surge-Trap SPD offers the fail-safe protection you need in one compact, self sufficient design.