Blue Sea Systems 7046 187 Series DC Circuit Breaker - Panel Mount, 120 Amps
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Heavy-duty DC circuit protection that combines switching and circuit protection in one accessible, panel-mount breaker—designed for marine electrical systems requiring reliable on/off control and branch protection.
Key Features
- Single lever operation is clearly visible for straightforward switching
- Ignition protected (conforming to SAE J1171), safe for installation aboard gas-powered boats
- Weather resistant for harsh onboard environments
- Panel mount design for a clean installation on a DC distribution panel
- 5/16-18 terminal studs for secure heavy-gauge connections
- Maximum voltage: 42 volts DC
Intended Use
- Marine DC electrical distribution and branch circuit protection
- Boat panels requiring both manual switching and circuit protection in one device
- DC loads where a resettable thermal circuit breaker is preferred over a fuse
Product Details
- Brand: Blue Sea Systems
- Model/Series: 187 Series
- Part number/SKU: 661-7046
- Mounting: Panel Mount
- Amperage: 120 Amps
- Type: DC Circuit Breaker (switchable/thermal style)
- Ignition protection: Conforming to SAE J1171
- Terminal studs: 5/16-18
- Maximum voltage: 42 volts DC
- Control: Single lever operation is clearly visible
- Weather resistance: Weather resistant
Parts Desk Insights
Best Use Case: Ideal for DC branch circuits on boats where you want a manual on/off switch plus resettable overcurrent protection at an accessible, panel-mounted location.
Common Issues: If nuisance tripping occurs, confirm the load draw matches the breaker rating and verify wiring/termination integrity at the 5/16-18 studs. For best results in high-vibration installations, recheck terminal torque and ensure mating surfaces and panel cutout alignment match the breaker’s intended mounting configuration.
Related Products & Accessories
- Electrical & Accessories - Browse related marine electrical components for breaker mounting, labeling, and distribution needs.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.