Mersen, originally known as Ferraz Shawmut, is a leading provider of high-quality power distribution blocks, electrical surge protectors, FHP motors, wires and cables to power, energy and process industries. The brand's pluggable UL Surge-Trap is a fuseless, fail-safe surge suppressor that features Mersen's patented Thermally Protected Metal Oxide Varistor (TPMOV) with a visual indicator, for the purpose of protecting sensitive electronic components from overvoltage transients. Raptor Supplies is an authorised distributor of Mersen electrical products and accessories like plastic distribution block covers, single pole optional touch safe covers and end barriers.