Sea-Dog 4208721 , Hi-Amp Surface Mount Resettable Circuit Breaker, 40 amps, A=2-7/8" B=1-7/8" C=1-3/4" D=2-3/16" E=1-1/16", 48 Volts
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The Sea-Dog 4208721 Hi-Amp Surface Mount Resettable Circuit Breaker is a single-pole, thermal resettable breaker designed to provide a visible indication when tripped. It’s built for marine-style wet-location use with a sealed, water-resistant construction—ideal for engine compartment and bilge area power distribution.
Key Features
- Single pole thermal type resettable circuit breaker
- Provides a visible indication of tripped condition
- Surface mount design (no mounting panel required)
- Water resistant and sealed for engine compartment and bilge area applications
- Thermoset plastic construction with stainless steel studs and washers
- CE certified
- Rated 40 amps, 48 volts (per product spec)
- Dimensions reference (A-E) included for surface-mount layout
Intended Use
- Marine engine compartment electrical protection
- Bilge area power distribution protection
- General 48V DC protected circuits requiring a resettable breaker
- Use as a resettable alternative to replaceable fuses for protected loads
Product Details
- Sea-Dog Hi-Amp Surface Mount Resettable Circuit Breaker, 40 amps, 48 Volts
- Interrupt level: 3000 amperes (per product spec)
- Circuit type: Single pole thermal type breaker
- Surface mount: mounting panel not required
- Water resistant and sealed for engine compartment and bilge area applications
- Construction: Thermoset plastic with stainless steel studs and washers
- CE certified
- Mounting envelope dimensions: A=2-7/8", B=1-7/8", C=1-3/4", D=2-3/16", E=1-1/16"
Parts Desk Insights
Best Use Case: Best suited for protecting individual 48V DC circuits in areas that see moisture—like engine compartments and bilge locations—while still allowing quick reset after a trip.
Common Issues: When installing surface-mount breakers, ensure the breaker’s mounting dimensions (A-E) match your planned cutout/bolt spacing and that the wiring lands firmly on the correct circuit connections. If nuisance trips occur, verify the load draw and inspect for loose terminations or intermittent wiring that could heat the breaker and trigger the thermal trip.
Related Products & Accessories
- Circuit Breakers - Browse the circuit breaker category for additional amperage ratings and compatible protection options.
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.