Fuse Block Ato 12 Circuit With grClear insulating cover with label recess for small Blue Sea Systems' labels. Cover insulates all conductive parts, satisfying ABYC/USCG requirements. Tin-plated copper buses and fuse clips give 30 Ampere rating per circuit. Rated for 32 Volts DC, 100 Ampere maximum per block. Accepts ATO and ATC fast acting blade type fuses and plug-in style circuit breakers. Thermoplastic base and polycarbonate cover.