3003 HD-Series Battery Switch Selector with Alternator Field Disconnect 

Features:

• 500 Ampere Continuous Rating
• Accepts 4/0 battery cables
• Ignition protected - safe for installation aboard gasoline powered boats
• .870" (22.01mm) stud length to accept 4 or more cable terminals
• 1/2" (M12) Tin-plated copper studs for maximum conductivity and corrosion resistance
• Meets American Boat and Yacht Council (ABYC) requirements for battery switches
• Tactile textures indicate knob position by feel only
• Case design allows surface or rear panel mounting
• Fits all Perko and Guest low amperage battery switch hole patterns