Product Description
Blue Sea Systems e-Series Battery Switch – ON/OFF – SKU 9003E
Heavy-Duty Battery Disconnect Switch for Marine, RV, and Off-Grid Applications
The Blue Sea Systems 9003E e-Series ON/OFF Battery Switch is a compact, ignition-protected rotary switch engineered for safely disconnecting battery banks from electrical systems. With a rating of up to 350A continuous at 12V DC, this switch is ideal for isolating a single battery or managing electrical load during maintenance, storage, or emergency shutoff.
Trusted by marine, RV, and industrial professionals worldwide, the 9003E is built to Blue Sea Systems’ rugged marine-grade standards and is certified for use in ABYC and USCG-compliant systems.
Key Features
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Simple ON/OFF Rotary Action
Intuitive 90° rotation design for quick disconnect or reconnection of a single battery. -
Ignition Protected (ISO 8846)
Safe for installation in engine rooms and gasoline-powered compartments—no risk of ignition from switch operation. -
High Current Capacity
Rated for 350A continuous, 600A intermittent, and 1500A cranking at 12V DC, making it ideal for large battery banks and starter circuits. -
Surface or Recess Mount
Versatile design mounts easily on bulkheads or panels, with removable side panels for cable routing. -
Isolates Battery Banks Safely
Prevents battery drain, electrical shorts, and unintended equipment use when off the water or on the road. -
UL 1107 Certified
Meets stringent marine safety standards for battery switches.
Technical Specifications
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Function: ON/OFF
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Configuration: Single circuit (switches a single battery to a single load)
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Stud Size: 3/8"-16 (tin-plated copper studs)
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Maximum Voltage: 48V DC
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Continuous Rating: 350A @ 12V DC
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Intermittent Rating: 600A (5 minutes)
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Cranking Rating (30 sec): 1500A
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Mounting Options: Surface or rear panel mount
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Ingress Protection: IP66 (Water resistant)
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Weight: 0.77 lb (0.35 kg)
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Dimensions: 3.85" x 3.85" x 3.0"
Recommended Use Cases
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Main battery disconnect for marine or RV systems
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Isolation switch for solar or off-grid battery banks
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Emergency shutoff switch for auxiliary or starter circuits
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Maintenance disconnect during system servicing
