PVS-R-350, Bussmann, 600Vdc Fast-acting, current-limiting RK5 fuses designed for protecting photovoltaic systems, rating 350 amps. 600VDC to UL 2579, 600VAC to UL248-12 A range of UL 2579 fast-acting 600Vdc Class RK5 fuses specifically designed to protect solar power systems in extreme ambient temperature, high cycling and low level fault current conditions (reverse current, multi-array fault)