Fast Acting Plug Fuse From the Manufacturer for replacing Edison base plug fuses in residential fuse panels. The base is the same as a light bulb base. All sizes fit the same fuse receptacle. This is an Edison base manual reset circuit breaker featuring brass threads with plastic body construction. Fits standard base fuse receptacles. Fuse is resettable upon overload event. Edison base plug fuse circuit breaker for permanent fuse replacement.