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Always Free Shipping—No Minimum Order Contiguous U.S. orders only. Alaska and Hawaii excluded.
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Eligible items may be returned within 30 days of delivery. Items must be new, unused, uninstalled, and in original packaging. An RMA is required.
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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
WARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.
Control high-current marine electrical systems with the Blue Sea Systems 3003 HD-Series Battery Switch Selector with Alternator Field Disconnect. Designed for boat owners, marine technicians, and installers, this ignition-protected battery switch provides a dependable way to select and manage battery power aboard gasoline-powered boats while supporting demanding electrical installations.
Built with a 500 Ampere continuous rating, the 3003 battery switch accepts 4/0 battery cables and uses 1/2-inch (M12) tin-plated copper studs for conductivity and corrosion resistance. The extended stud length accommodates four or more cable terminals, helping simplify connections in installations with multiple battery cables. Its alternator field disconnect function supports appropriate electrical system installation and operation when required by the vessel’s configuration.
The HD-Series case design supports surface or rear panel mounting, providing installation flexibility for a range of marine electrical layouts. It
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WARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to 
