Sherco-Auto Blue Sea 9003E E-Series Master Battery Switch Single Circuit ON/Off for Marine Boat

The Sherco Automotive & Marine Supplies Part Number: BSEA-9003EB Blue Sea 9003E E-Series Master Battery Switch is a single-circuit ON/OFF marine boat switch. Its specifications are as follows:

Switch Type: Single Circuit ON-OFF Color: Red Switch Positions: 2 Battery Combine: No Alternator Field Disconnect: Yes, this feature protects the alternator's diodes if the switch is turned off while the engine is running. If the Alternator Field Disconnect (AFD) is not used, an LED can be connected to the AFD terminals to indicate when the battery switch is in any position other than OFF. Maximum Voltage: 48V DC Terminal Stud Torque: 140 in-lb (15.82 Nm) Continuous Rating: 350A, which is the maximum current the switch is designed to conduct for an indefinite period. Intermittent Rating: 600A (5 min), which is the maximum amount of current the switch is designed to carry for a minimum of 5 minutes. Cranking Rating: 1200A (30 sec), which is the current required by the starter circuit prior to engine starting. Battery Inputs: 1 Cable Clearance for 4/0 AWG Cables: 1.10 in (27.94 mm) Cable Size to Meet Ratings: 4/0 AWG (120 mm²) Mounting Holes: Accept 1/4" (M6) screws Stud Material: Tinned Copper Terminal Stud Size: 3/8" - 16 (M10) Weight: 1.30 lb (0.59 kg)

Battery switches, like the Blue Sea 9003E, are essential for isolating the potentially destructive energy in the battery banks when the boat is not in use or during emergencies. The Continuous Rating of 350A ensures the switch can handle the maximum current required for an indefinite period, making it a reliable choice for marine applications.

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