Renewable fuse with longer time-lag than other Class H fuses to better sustain over-loads without needlessly opening. Costs often cut in half on new motor installations because code in many cases permits smaller size fused safety switches, fuse panels, or fuse blocks if Buss Super-Lag fuses are used. Super-Lag design of Buss links reduce number of blows on starting currents or other harmless overloads. Links are 1-piece, all sizes. Buss Super-Lag links are interchangeable with all makes of standard fuse links. For voltage up to 250 volts.