30a cartridge fuse. Fusetron dual-element, time-delay current limiting fuses. Provide motor overload ground fault and short-circuit protection. When used in circuits subject to surge currents, such as those caused by motors, transformers, and other inductive components, these fuses can be sized close to full-load amperes to give maximum overcurrent protection. The time delay feature makes it possible to use fuse ampere ratings which are much smaller than those of nontime delay fuses. Provide a higher degree of short-circuits in which surge currents or temporary overloads occur. Helps protect motors against burnout from overloads. 600V. UL listed, CSA (Canadian Standards Association) certified. Fuse Type: Fusetron FRS-R Cartridge, Fuse Function: Time Delay, Amperage Rating: 30A, Class: RK5, Diameter: 0.81", Length: 5", Voltage Rating: 600V, UL Listed?: Yes