Blue Sea 3003 HD-Series Battery Switch with AFD

The Blue Sea 3003 HD-Series Battery Switch Selector pairs a 500A continuous-rated selector switch with an alternator field disconnect for protecting your alternator during servicing. It is designed for boaters who want heavy-duty battery bank selection and alternator protection in one switch that drops into existing Perko or Guest mounting holes.

Tactile textures on the knob let you feel which position you're in without looking, useful in low light or rough conditions, and 1/2-inch tin-plated copper studs with 0.870-inch length accept 4 or more cable terminals. It's ignition protected for safe installation aboard gasoline-powered boats and can be surface or rear panel mounted. Browse more options in our panels, switches, and circuit breakers category.

Key Features

• accepts 4/0 battery cables
• meets ABYC battery switch requirements
• tactile knob positions
• fits Perko/Guest hole patterns
• ignition protected

Frequently Asked Questions

What does the alternator field disconnect do? It protects the alternator field during servicing when the battery switch is operated.

Will this fit my existing switch mounting holes? Yes, it fits all Perko and Guest low amperage battery switch hole patterns.

What's the continuous amperage rating? 500A.