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A Solar fuse is designed specifically for the protection of photovoltaic (PV) systems. Littelfuse and Bussmann offer fast acting solar fuses that are manufactured in Class RK5 case sizes. The Bussmann series rated at 600 volts AC and 600 volts DC. The interrupting rating is up to 200,000 amps AC and up to 20,000 amps DC. Amperage ratings range from 20 to 350 amps. These fuses built in accordance with UL 2579, UL Std. 248-12 and CSA C22.2 standards.
Littelfuse also offers a blade style solar fuse that is manufactured in Class-R case sizes. These fuses are fast acting and are rated at 1,000 volts DC. The interrupting rating is up to 10,000 amps DC. Amperage ratings range from 250 to 400 amps. These fuses are UL Recognized and CSA Certified.