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BLUE SEA SYSTEMS 187 Series Thermal Circuit Breakers

Switching and circuit protection in a single device. Single lever operation. Waterproof, with recessed mounting holes for a clean appearance. Self-trimming case eliminates the need for mounting panels or trim bezels and permits easy installation with a standard sized hole saw. Large clearance around 5/16" terminal studs accept heavy gauge wire lugs and allows high-torque connections. Ignition-protected—safe for installation aboard gasoline-powered boats. Interrupt rating: 5000A at 12V DC.

  • Switch Type: Toggle
  • Voltage Compatibility: 48V DC
  • Safety Features: "Trip Free" design. Ignition-protected
  • Housing Material: Thermoset polyester
  • Housing Dimensions: Surface Mount: 3.44"H x 2.32"W x 1.8"D; Panel Mount: 3.38"H x 2.26"W x 1.75"D. 2.10" cutout dia.
  • Terminal Type: 5/16" terminal studs
  • Mounting Hardware: #10 screws
  • Approvals: Meets SAE J1171 external ignition protection requirements
  • Warranty: Five years
Customer Reviews
Product Models
Description WM Model # MFG Part # Availability Price Quantity  
187 Series Thermal Circuit Breaker, Panel Mount, 50A 8646333 7039
In stock online.

$92.99

187 Series Thermal Circuit Breaker, Panel Mount, 80A 8646341 7042
In stock online.

$92.99

187 Series Thermal Circuit Breaker, Panel Mount, 100A 8646358 7044
In stock online.

$92.99

187 Series Thermal Circuit Breaker, Panel Mount, 150A 8646366 7048
In stock online.

$92.99

187 Series Thermal Circuit Breaker, Panel Mount, 200A 11975661 7049
In stock online.

$134.99

187 Series Thermal Circuit Breaker, Surface Mount, 50A 8646374 7139
In stock online.

$92.99

187 Series Thermal Circuit Breaker, Surface Mount, 80A 8646382 7142
In stock online.

$92.99

187 Series Thermal Circuit Breaker, Surface Mount, 100A 8646390 7144
In stock online.

$92.99

187 Series Thermal Circuit Breaker, Surface Mount, 150A 8646408 7148
Ships when available.

$92.99

187 Series Thermal Circuit Breaker, Surface Mount, 200A 11975679 7149
In stock online.

$134.99

Product Description

Switching and circuit protection in a single device. Single lever operation. Waterproof, with recessed mounting holes for a clean appearance. Self-trimming case eliminates the need for mounting panels or trim bezels and permits easy installation with a standard sized hole saw. Large clearance around 5/16" terminal studs accept heavy gauge wire lugs and allows high-torque connections. Ignition-protected—safe for installation aboard gasoline-powered boats. Interrupt rating: 5000A at 12V DC.

  • Switch Type: Toggle
  • Voltage Compatibility: 48V DC
  • Safety Features: "Trip Free" design. Ignition-protected
  • Housing Material: Thermoset polyester
  • Housing Dimensions: Surface Mount: 3.44"H x 2.32"W x 1.8"D; Panel Mount: 3.38"H x 2.26"W x 1.75"D. 2.10" cutout dia.
  • Terminal Type: 5/16" terminal studs
  • Mounting Hardware: #10 screws
  • Approvals: Meets SAE J1171 external ignition protection requirements
  • Warranty: Five years

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