Blue Sea Systems e-Series On-Off Battery Switch
Single-circuit On-Off switch for one battery and one load group
SKU BLUE-9003E
e-Series single-circuit On-Off battery switch, 350A continuous, 48V DC maximum. Disconnects a single battery from one load group.
- Switch Type
- Single Circuit ON-OFF
- Switch Positions
- 2
- Continuous Rating
- 350A
- Maximum Voltage
- 48V DC
- Battery Combine
- No
- Alternator Field Disconnect
- No
- Color
- Red
- Voltage
- 48V DC
Stocked items typically ship the next business day from our US warehouse. 30-day returns on unused stocked items. Exclusions apply. Return policy · Shipping policy
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About this product
Blue Sea Systems e-Series On-Off Battery Switch, 350A continuous, 48V DC maximum. Manufacturer PN 9003e.
The Blue Sea Systems e-Series On-Off battery switch connects or disconnects one battery from one load group with a clear two-position rotary control. It is an ignition-protected marine battery disconnect.
Key features
- 2 positions: Off and On; single battery input and single load circuit
- 350A continuous, 600A intermittent (5 min), 1200A starting (30 sec)
- 48V DC maximum; 3/8"-16 (M10) tinned-copper studs
- Ignition protected; surface or rear-panel mounting
This is a single-circuit On-Off switch, not a battery selector: it cannot combine two banks. It does not include Alternator Field Disconnect. Torque terminal studs to 140 in-lb (15.82 Nm).
Product details
- Switch Type
- Single Circuit ON-OFF
- Switch Positions
- 2
- Continuous Rating
- 350A
- Maximum Voltage
- 48V DC
- Battery Combine
- No
- Alternator Field Disconnect
- No
- Color
- Red
- Voltage
- 48V DC
- Amperage
- 350A
- Manufacturer
- Blue Sea Systems
Shipping & returns
- Stocked items typically ship the next business day from our US warehouse.
- 30-day returns on unused stocked items. Exclusions apply. See policy
- Custom and quoted items are non-returnable once production begins.
Warranty
Backed by the original manufacturer’s warranty plus our workmanship guarantee on assembled harnesses. Contact us with your invoice and we’ll coordinate any covered repair or replacement.
Read the full warranty termsTechnical support
Need help choosing the right part?
Our marine electrical team can review your setup and recommend compatible products. Send a photo, a sketch, or your circuit list and we'll come back with a parts list that fits the boat.
Certifications & training
- ABYC-aware build practices
- OEM-grade marine wire & terminals
Additional capabilities are based on hands-on experience building marine wiring systems rather than third-party certification.
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Why buy from Common Ground Marine
- 20+ years building marine wiring harnesses, panels, and shore-power systems.
- Engineers — not a phone tree — review every custom build before parts are cut.
- OEM-grade components: tinned copper, sealed connectors, marine-rated jackets.