Skip to product information
1 of 3

Brand: Blue Sea Systems

Blue Sea Systems 3003 HD-Series Battery Selector Switch with Alternator Field Disconnect

Blue Sea Systems 3003 HD-Series Battery Selector Switch with Alternator Field Disconnect

Regular price $115.68
Regular price Sale price $115.68
Sale Sold out
Shipping calculated at checkout.

Sold out

Quantity

The Blue Sea Systems 3003 HD-Series Battery Selector Switch is designed for reliable battery management, featuring an integrated Alternator Field Disconnect (AFD). This switch is engineered for safety and durability in marine environments, meeting all ABYC requirements for battery switches.

  • 500 Ampere continuous rating (labeled 700a peak capacity)
  • Includes Alternator Field Disconnect (AFD)
  • Ignition protected for safe installation on gasoline-powered vessels
  • 1/2" (M12) tin-plated copper studs for high conductivity and corrosion resistance
  • Stud length of 0.870" (22.01mm) accommodates 4 or more cable terminals
  • Compatible with 4/0 battery cables
  • Tactile knob textures indicate position by feel
  • Flexible mounting options for surface or rear panel installation
  • Standard hole pattern matches Perko and Guest low-amperage switches
  • Regulatory note: This product contains chemicals, including di(2-ethylhexyl)phthalate (DEHP), known to the State of California to cause cancer, birth defects, or other reproductive harm.

Product facts

CT SKU
CT-100338
Model / MPN
3003
UPC / GTIN
632085030032
Package dimensions
3" X 7" X 9"
Package weight
1.3 lb
Specifications
Positions = 4\nAFD = Yes\nContinuous Amperage = 700a

Fit-sensitive item: confirm measurements, model numbers, and manufacturer details before ordering. Tug & Tow does not guarantee universal compatibility from a product page alone.

Shipping & returns

Shipping methods, delivery estimates, and final costs appear at checkout before payment. Some bulky, supplier-shipped, or special-handling items may ship separately. See Shipping & Returns for return windows and eligibility.

Fit & compatibility

Review the product title, description, images, dimensions, part numbers, and manufacturer details before purchase. For fit-sensitive items, confirm compatibility with your boat, RV, trailer, vehicle, or equipment.

Need help choosing?

Send us the product link or SKU, plus details about your boat, RV, trailer, vehicle, or project. We will help you narrow down the right option when product fit is not obvious.