The FTR14D471K Varistor is a 385V to 775V, 4.5KA, 7.5mm through-hole component produced by FTR that conforms to the RoHS standard for hazardous substances. It is designed to provide voltage protection from transient surge events. It is commonly used to protect current-sensing circuits, motors, switches and other electronic components from over-voltage transients. The FTR14D471K Varistor also has a high electrical breakdown rating and is encased in an epoxy case for increased environmental protection.