Quickly and easily protect valuable equipment from excess current with S15J plug-and-play in-line fuses. The compact rugged design allows installation in tight spaces, even in extreme temperatures and dirty or wet conditions. A simplified two-LED system gives instant visual updates on the fuse status. The fast blow model carries a UL certification that enables non-Class 2 certified power supplies to meet those criteria when connected in series with a fast blow rated fuse (see datasheet for details).