50amp. Ignition protected (conforming to SAE J1171)- safe for installation aboard gasoline powered boats (35-500 Amp only). Silver-plated connector blades for corrosion resistance. Visible indication of blown condition. 6,000 Ampere Interrupt Capacity (AIC) satisfies ABYC requirements for main DC circuit protection on large battery banks. For use with Blue Sea Systems ANL Fuse Blocks.