The TPN fuse is designed for DC power distribution systems. The TPN series of fast/acting fuses are dimensionally similar to Class R fuses. Recognized branch circuit protection and current-limiting capability. Complete system coordination capability. Energy savings with low watt loss, low operating temperatures, and minimum l2t levels. Current Limiting Ampere Ratings: 1-600 Amps. Voltage Rating: 170 Volts DC. Interrupting Rating: 100,000A. Construction: Silver-Plated Terminals.