Mersen SLR in-line fuses are used to protect fluorescent lighting fixtures and ballasts. The SLR is a fast-acting fuse. Used to protect individual 300V fixtures. Integral fuse and insulating cap. Body material glass. 300VAC voltage rating, 10kA interrupt rating, 15 ampere current rating. Approvals: UL listed file no. E10480 CSA certified. Measures 1/4-inches diameter by 1-29/32-inches length.