Bussmann NON-20 20 Amp One-Time Cartridge Fuse Non-Current Limiting Class K5, 250V UL Listed 20A Type Non Cartridge Fuse General Purpose Voltage: 250V Protect lighting, heating, and other circuits not subject to temporary surges and where available short-circuit currents are relatively low ONE-TIME fuses do not have a time delay feature and thus should not be specified in circuits where large transients or motor overloads occur For general purpose circuits, size at ampere rating of circuit For motor circuits, size at 300% to 400% UL Listed - 250Vac: Class H (65-600A), Std. 248-6