Blue Sea 187-Series Circuit Breaker

  • Model: 187 Series
  • Manufactured by: Blue Sea Systems


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187-Series Circuit Breaker - Surface Mount

Thermal circuit breakers provide heavy duty circuit protection for 25 to 200

Amp loads when switching and circuit protection are both required.

  • Combines switching and circuit protection into a single device*
  • Clear, single lever operation
  • "Trip Free" design cannot be held "ON" during fault current condition
  • Waterproof
  • Recessed mounting holes for clean appearance
  • Large Clearance around terminal studs accecpt heavy gauge wire lugs
  • Robust 5/16 M8 terminals provide high torque connections
  • Large lever with vertical/horizontal orientation provides indication of trip status
  • Ignition protected - Safe for installation aboard gasoline powered boats
  • Meets SAE J1171 external ignition protection requirements

    * Do not use as a switch where high inrush currents are expected.


  • Amperage - 25A-200A (Please select below)
  • Maximum Voltage - 48V DC
  • Mounting - Surface or Panel Mount (Please select below)
  • Circuit Breaker Type - Thermally responsive Bi-metal blade
  • Interrupt Capacity (The fault current that a device, normally a fuse or circuit breaker is capable of breaking without damage.)
    • 5000A @ 12V
    • 3000A @ 24V
    • 1500A @ 42V
  • Minimum Operating Temperature - -40° C
  • Maximum Operating Temperature - 85° C
  • Case Material - Thermoset Polyester
  • Circuit Breaker Class - Type III - switchable/manual reset - trip free
  • Mounting Hole - Accept #10 (M5) Screw
  • Terminal Stud Size - 5/16-18
  • Terminal Stud Torque - 75 in-lb (8.47 Nm)
  • Weight - 0.58lb (0.26 kg)

    Panel Mount Diagram

    Surface Mount Diagram

  • This product was added to our catalog on Thursday 14 August, 2014.

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