Large Format DC Circuit Breakers
Surface Mount 187 Series DC Circuit Breakers
> Blue Sea 7138 Surface Mount 187-Series DC Circuit Breaker 40 Amps
Blue Sea Systems #7138 187-Series DC circuit breaker Surface 40 Amps
Blue Sea 7138 Surface Mount 187-Series DC Circuit Breaker 40 Amps
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Combines switching and circuit protection into a single device
Clear, single lever operation
"Trip Free" design cannot be held "ON" during fault current condition
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
Assembled in Mexico by Cooper Bussmann -p/n 187040S-03-1
Detailed specification, drawings, and description.
What the difference between this and the 7182 surface mount 40 amp breaker?
Good question. The 187 series breakers have a higher specification all around and are more expensive.
The 187-Series have 5/16" terminals instead of 1/4" and they have more room to attach larger cables. They have an interrupt capacity of 5000 Amps @ 12 Volts instead of 3000 Amps which means they are allowed as primary circuit protection when connected to larger battery banks.
The one area where the 285 series breaker wins is in waterproofing. The 285 series is IP67 and the 187 series is IP66
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Answer provided by:
Peter Kennedy (3/16/2018)
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WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to
You will need a
with a 5/16" hole to connect to this circuit breaker.
Ancor Marine Tinned Battery Cable 6 awg Red - 100 ft roll
Custom battery cables - (These are made to order and are not returnable)
Typically 24 hr turnaround - custom cables do not qualify for free shipping
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