Blue Sea E-Series Battery Switches On-Off.

Blue Sea Systems e-Series On-Off Battery Switches

Models:

• e-Series On-Off Battery Switch: 9003E-BSS

• e-Series On-Off Battery Switch with Alternator Field Disconnect (AFD): 9004E-BSS

These e-Series switches provide a continuous current rating of 350 Amps, designed for inboard gasoline or diesel engines. They feature tin-plated copper studs for optimized conductivity and corrosion resistance, supporting battery cables up to 4/0 AWG. Both models have a tactile knob indicator to convey switch position and a case design suitable for surface or rear panel mounting. Rated IP66 waterproof and ignition protected, they are suitable for demanding marine environments with a make-before-break contact design to allow switching without power interruption.

Key Features

• Continuous rating of 350 Amps appropriate for gasoline and diesel engines

• Tin-plated copper studs that never loosen, accepting 3/8" (M10) ring terminals

• 7/8" (22mm) stud length to accept multiple cable terminals

• Fits most Perko and Guest low amperage battery switch hole patterns

• Waterproof IP66 rated for protection against powerful water jets

• Ignition protected ensuring safe installation in gasoline-powered boats

• Make-before-break design for seamless switching without power loss

• Alternator Field Disconnect (AFD) included in 9004E-BSS model for additional alternator protection

Specifications Comparison

What’s in the Box

• Model-specific e-Series On-Off Battery Switch

• Installation Instructions