Edison Dual Element Time Delay FuseEdison dual element time-delay class RK5 fuses are recommended for AC power distribution mains, feeders and branch circuits for motors and transformers, or lighting and heating. In ratings up to 600A, ECNR/ECSR series fuses are one of the most popular styles used for industrial applications and offer a minimum time-delay of 10 seconds at 5x fuse rating.Features:Sold IndividuallyAmp Rating: 40 Amp600V ApplicationDimensions: 5-1/2" Length x 1-1/16" DiameterClass RK5Applications: Recommended for AC power distribution system mains, feeders, and branch circuitsProtection of motors and motor branch circuitsProtection of transformers and other inductive loads All general-purpose applications including lighting, heating and other non-inductive loadsSupersedes / Replaces: FLSR040 FLNR-40 FRNR40 FRN-R-40 ECSR40 ECSR-40 81140 82140 Cefco CRS-R40 LOS-R40 FRS-R40 FRSR40 HAS-R40 HASR40 Ferraz/Shawmut TRS40 TRS40R and others.