Fuse, 4 A, 300V AC, Not Rated, GLR Series, Glass Fuse, Fast Acting, Body Style Cylindrical, Nonrejection, Interrupt Rating 10kA at 300V AC, Fuse Size 2-1/4 in L x 5/8 in dia, Length 2 1/4 in, Diameter 5/8 in, Equivalent Brand and Series Bussmann GLR, Littelfuse LGR, Mersen SLR, Equivalent Series GLR, LGR, SLR, Body Material Glass, Compatible Fuse Block Series HLR, Cap Diameter 5/8 in, Single Element, Standards CE, CSA Certification Class 1422-01, UL 248-14 Guide JDYX One-piece, fast-acting glass fuses with knob combine a fuse body and an insulating cap into a single unit for use as an in-line fuse to protect fluorescent lighting fixtures from overcurrent. They fit into a compatible holder to form a fuse assembly, which can be installed in each fixture on a branch circuit. In the event of a.