Blue 9003E Blue Sea Eseries Battery Switch Single Circuit Onoff
by Blue Sea Systems

Price:  $49.58
MFG Part:  9003E
UPC:  632085900359
Condition:  New Open Box

In Stock.

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)


$4958

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 RGrantSmith

Super Bright, Good

June 13, 2026

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