Blue Sea Systems 7143 187 Series DC Circuit Breaker - Surface Mount, 90 Amps
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You have 30 days to request a return. All sale items are final sale.
Blue Sea Systems 7143 (187 Series) is a surface-mount DC circuit breaker designed for medium-duty protection where switching and circuit protection are needed together. It features ignition protection to SAE J1171 requirements and a rugged, weather-resistant housing for marine electrical installations.
Key Features
- Single lever operation for clear, visible switching
- Ignition protected (conforming to SAE J1171) for installation aboard gas-powered boats
- Weather resistant construction
- Surface mount DC circuit breaker for switching and protection in one device
- 5/16-18 terminal studs for secure heavy-duty connections
- Maximum voltage rating: 42 volts DC
Intended Use
- Marine DC electrical systems (switching + circuit protection)
- Gas-powered boat electrical installations where external ignition protection is required (SAE J1171)
- General-purpose DC distribution and protection for boats, RVs, or similar 12V/24V DC loads
Product Details
- Blue Sea Systems 7143 187 Series DC Circuit Breaker - Surface Mount, 90 Amps
- SKU: 661-7143
- Type/Series: 187 Series DC circuit breaker (thermal circuit breaker)
- Mounting: Surface mount
- Amperage rating: 90 Amps (90A)
- Terminal studs: 5/16-18
- Maximum voltage: 42 volts DC
- Ignition protection: Conforming to SAE J1171
- Operation: Single lever operation
- Weather resistance: Weather resistant
Parts Desk Insights
Best Use Case: Choose this 187 Series surface-mount breaker when you need both a switch function and DC overcurrent protection in a single component—especially for installations that must meet external ignition protection expectations (SAE J1171).
Common Issues: If the breaker trips frequently, confirm you’re using appropriately sized conductors and that the circuit load (and any downstream wiring/terminals) matches the breaker rating. Also verify the lug size and torque for the 5/16-18 studs to ensure a reliable, low-resistance connection.
Related Products & Accessories
- Fuses - Browse compatible fuse options for primary protection in DC circuits.
- Electrical & Accessories - Explore matching marine electrical switches, breakers, and distribution accessories.
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.