The FRS-R-40 is a 40A advanced protection energy efficient dual element Time-delay Fuse provides motor overloads and single-phasing when sized properly. Dual-element feature provides the best time-delay performance, allowing closer sizing and superior protection of motors and transformers. Closer sizing allows for smaller fuses and less costly switches. Class RK5 fuses with a 200kA interrupting rating for use in a broad range of applications. Dual-element fuse can be applied in circuits subject to temporary motor overloads and surge currents to provide both high performance short-circuit and overload protection. The time-delay feature makes it possible to use fuse amp ratings that are much smaller than those of non-time delay fuses. Provides current limitation to help protect downstream components from high fault currents. Gives motor running back-up protection to motors without extra costs.