Blue Sea Systems

Blue Sea Systems 9003E E Ser. Batt Sw, 1 Ckt On-off, Red

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SKU:
18316901
MPN:
9003e
Availability:
Usually ships the same or next business day. In stock at our CA, FL, GA, KS, MI, PA, TX, WA warehouses.
Shipping:
Calculated at Checkout
Stock Update:
12/08/2025 08:39:26 PM PST
$46.29

Bulk discount rates

Below are the available bulk discount rates for each individual item when you purchase a certain amount

Buy 2 and pay only $42.07 each 42.07
Buy 3 and pay only $40.49 each 40.49
Buy 4 - 9 and pay only $37.81 each 37.81
Buy 10 or above and pay only $36.87 each 36.87
Stock Update:
12/08/2025 08:39:26 PM PST

Description

This item is brand-new, factory sealed.

Blue Sea Systems e-Series On Off Battery Switch

Model: 9003E-BSS
  • 350 Amps continuous rating for inboard gasoline or diesel engines.
  • Tin-plated copper studs for maximum conductivity and corrosion resistance
  • Accepts up to 4/0 AWG battery cables
  • Studs accepts 3/8" (M10) ring terminals
  • 7/8" (22mm) stud length accepts multiple cable terminals
  • Blue Sea Systems one-piece terminal stud design never loosens over time
  • Fits most Perko and Guest low amperage battery switch hole patterns
  • Case design allows surface or rear panel mounting
  • Tactile indicator conveys knob position by feel
  • Waterproof — rated IP66 from water projected in powerful jets
  • Ignition protected—safe for installation aboard gasoline powered boats
  • Make-before-break contact design allows switching without power interruption

Switches a single battery to a single load group

Specifications
Switch TypeSingle Circuit ON-OFF
ColorRed
Switch Positions2
Battery CombineNo
Alternator Field DisconnectNo
Maximum Voltage48V DC
Terminal Stud Torque140 in-lb (15.82 Nm)
Continuous Rating350A
Intermittent Rating600A (5 min)
Cranking Rating 30 sec1200A per circuit
Battery Inputs1
Cable Clearance For 4/0 AWG Cables1.10in (27.94 mm)
Cable Size to Meet Ratings4/0 AWG (120mm )
Mounting HolesAccept 1/4" (M6) Screw
Stud MaterialTinned Copper
Terminal Stud Size3/8" - 16 (M10)
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Warranty Information

All Items are Brand New, Factory Sealed and come with a standard warranty. [Read our policies]
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Blue Sea Systems 9003E E Ser. Batt Sw, 1 Ckt On-off, Red
$46.29