With a continuous duty rating of 500 amps, these switches are suitable for use starting large diesel and gasoline engines.

Ignition protected (SAE J1171); safe for installation aboard gasoline powered boats
AFD (Alternator Field Disconnect) function on 3003 protects alternator diodes if the selector switch is inadvertently turned to the OFF position while the engine is running
Corrosion-resistant, one-piece, tin -plated, 1/2" copper studs cannot loosen, and accept multiple cables up to 4/0
Rated at IP66 - withstands heavy seas, jets of water
Case design allows surface or rear panel mounting
Meets all American Boat and Yacht Council (ABYC) requirements for battery switches; UL listed; CE marked
Fits all Perko and Guest low amperage battery switch hole patterns

Note: Maximum ratings in Specification Table are when using 4/0 cable.