Blue Sea E-Series 300A Battery Switch Dual Circuit Plus

  • Model: 5511E
  • Manufactured by: Blue Sea Systems


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Simultaneously switches two isolated battery banks or combines battery banks to all loads
Make-before-break contact design allows switching between battery banks without power interruption
Ignition protected—safe for installation aboard gasoline powered boats
Case design allows surface or rear panel mounting

CE Marked. Ignition protected - Safe for installation aboard gasoline powered boats.


  • Case design allows surface or rear panel mounting
  • Meets American Boat and Yacht Council (ABYC) requirements for battery switches
  • 3/8"-16 tin-plated copper studs for maximum conductivity and corrosion resistance, accepts 3/8" and M10 ring terminals
  • 7/8" (22.22mm) stud length to accept multiple cable terminals
  • Tactile textures indicate knob position by feel only


  • Inrush Rating: 0.25 sec (10 repeats) - 1,500 Amperes DC
  • Cranking Rating: 9.75 sec (10 repeats) - 700 Amperes DC
  • Intermittent Rating: 5 min (UL 1107) - 525 Amperes DC
  • Continuous Rating: (UL 1107) - 350 Amperes DC
  • Maximum Voltage Rating - 32 Volts DC
  • Terminal Stud Size - 3/8"-16 (M10)
  • Terminal Stud Torque - 140 in-lb (15.82 N?m)
  • Cable Size to Meet Ratings - 4/0 AWG (95mm²)
  • Cable Clearance For 4/0 AWG Cables - 1.10" (27.9mm)
  • Case Material - Reinforced Polycarbonate

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