Product Description
Blue Sea 3000 500A 4-Position Battery Selector Switch with Alternator Field Disconnect. Model: 3003-BSS. It features tin-plated copper studs for excellent conductivity and corrosion resistance. Can accept up to 4/0 AWG battery cables. The 1/2' (M12) studs take ring terminals, and the 7/8' (22mm) stud length fits multiple cable terminals. Its one-piece terminal stud design won't loosen over time. Fits most Perko and Guest low amperage battery switch hole patterns. Has surface, rear, or front panel mounting options. A tactile indicator shows the knob position by touch. It's waterproof (rated IP66 against powerful water jets) and ignition protected, safe for gasoline-powered boats. The make-before-break contact design allows seamless switching between battery banks. Comes with AFD (Alternator Field Disconnect). Specifications: Switch Type - Selector 4 Position, Color - Grey, 4 Switch Positions, Battery Combine - Yes, Alternator Field Disconnect - Yes, Max Voltage - 32V DC, Terminal Stud Torque - 220 in-lb (24.86 Nm), Continuous Rating - 500A, Intermittent Rating - 700A (5 min), Cranking Rating 30 sec - 1600A, 2 Battery Inputs, Cable Clearance for 4/0 AWG Cables - 1.10in (27.94 mm), Two Cables / Terminal to meet ratings, Cable Size - 4/0 AWG (120mm), Mounting Holes accept 1/4' (M6) Screw, Terminal Stud Size - 1/2' (M12).
Using this Blue Sea battery switch is easy. First, make sure the power is off before installation. Connect the battery cables to the appropriate terminals as per the cable size requirements. The tactile indicator helps you know the knob position just by touch. When using, you can switch between battery banks without any power interruption thanks to the make - before - break contact design. For maintenance, regularly check the terminal studs to ensure they're tight, as the one - piece design usually doesn't loosen over time. Keep the switch clean and dry. Since it's waterproof, it can handle powerful water jets, but still avoid long - term submersion. This switch is ignition protected, so it's safe for gasoline - powered boats, but always follow proper safety procedures during installation and use.
