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Circuit Breaker Cover Red by Sea Dog Marine (420840-1)

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Circuit Breaker Cover Red by Sea Dog Marine (420840-1)


If you do a lot of wiring in your camper, boat, motorcycle, or other vehicles, you probably encounter problems with your circuit breaker. Uncovered circuit breakers are prone to rust due to unwanted water splashes. If not prevented, may cause significant damage to your power system and your vehicle overall.

The SeaDog Resettable Circuit Breaker Cover is the solution to that problem. Made from polyvinyl chloride, this circuit breaker cover provides protection from water splashes from the lake, sea, or rain. Minimizing the risk of electric shock, this product will serve as a protection cover so you don’t have to worry about exposed power connections. The red color design makes it easy to distinguish.

Very easy to install, reliable in all situations. Get the SeaDog Circuit Breaker Cover (3-420840-1) for a robust wiring system.


  • Resettable circuit breaker cover

  • Made from polyvinyl chloride material

  • Protects your circuit breaker from water splashes that may cause rust

  • Small and compact

  • Compatible with part numbers 420852-1, 420853-1, 420854-1, and 420855-1


  • SKU: 3-420840-1

  • UPC: 035514425544

  • Weight: 0.02 LBS

Stamped Brass/Injection Molded Nylon/Polycarbonate

Inline Resettable Circuit Breakers with manual reset button are for use with higher amperage accessories. These breakers are ignition protected and can be installed aboard gasoline powered boats. May be used on 12 VDC or 24 VDC systems. Constructed of injection molded nylon and polycarbonate and stamped brass #10-32 studs with nuts. The copper post is the battery or "power in" post and the silver post is the auxiliary or "power out" protected post. Available with or without splash proof Breaker Cover (420840). Complies with SAE standard J553 and SAE J1171.

This product replaces:

    420840, 420840-1, 3-420840, 35514425544


We can ship to virtually any address in the US. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.)

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, please Contact Us with your order number and details about the product you would like to return. We will respond quickly with instructions for how to return items from your order.

Need help? We're available at+1 (800) 664-8116 - Email us
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