The Bussmann KLU-2500 Class L fuse is a 2500-amp, 600-volt Limitron time-delay fuse designed for high-current protection in industrial power systems. It uses a bolt-on Class L, current-limiting design with a 200 kA interrupting rating at 600 VAC and a minimum time delay of about 5 seconds at 500% of rated current, enabling coordination with upstream protection. Typical applications include feeders, motors, and switchgear in commercial and industrial environments where reliable current limiting is required. As part of the Bussmann Limitron Class L family, the KLU-2500 is commonly discussed in literature alongside potential upgrade paths to Low-Peak KRP-C fuses in certain installations.
