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Sea-Dog Line 420872-1 Surface Mount Circuit Breaker 40 Amp 48V

Manufacturer

Sea-Dog Line

<h3>About Sea-Dog Line</h3><p>Few names in the marine industry carry as much history as <strong>Sea-Dog Line</strong>. Founded in 1923 and headquartered in Everett, Washington, Sea-Dog has spent over a century engineering and supplying dependable hardware for boaters, riggers, and marine professionals. Whether you are outfitting a small fishing boat or a serious offshore vessel, Sea-Dog's expansive catalog — spanning more than 2,400 products — is built around one principle: hardware that holds up when it matters most.</p><h3>A Century of Marine Innovation</h3><p>Sea-Dog Line began as a focused marine rigging and hardware supplier, and over the decades grew into one of the most comprehensive sources for anchoring, docking, boarding, and boat-management equipment in the industry. Their product line has expanded to include antenna accessories, trailer hardware, boat hooks, cabinet and hatch fittings, chain and rigging components, and a wide range of electrical accessories — all engineered to withstand the corrosive, high-stress environment of the marine world.</p><p>What sets Sea-Dog apart is a commitment to manufacturing quality that boat owners can rely on season after season. Their hardware is designed for real-world marine use, meaning saltwater resistance, UV stability, and structural durability are never afterthoughts.</p><h3>Marine Visibility & Windshield Systems</h3><p>One of Sea-Dog's highest-demand product areas is their line of <a href="/7549-sea-dog-line-windshield-washers-wipers-replacement-motors-201195">Windshield Washers, Wipers &amp; Replacement Motors</a>. Maintaining clear visibility on the water is a safety-critical function, and Sea-Dog supplies a broad assortment of wiper blades, washer systems, and complete replacement assemblies designed to fit a wide variety of marine windshield configurations. For boaters who need a direct drive solution, Sea-Dog's dedicated <a href="/7549-sea-dog-line-windshield-wiper-motor-8824">Windshield Wiper Motors</a> offer reliable performance in wet, high-vibration marine environments — a category where component quality directly affects on-water safety.</p><h3>Cockpit Comfort & Functionality</h3><p>Beyond hardware and visibility systems, Sea-Dog also brings practical innovation to the helm and cockpit with their <a href="/7549-sea-dog-line-cockpit-fillet-tables-200274">Cockpit &amp; Fillet Tables</a>. These tables are designed to maximize usable space aboard, whether you are prepping a catch, serving guests, or simply organizing gear. Sea-Dog's tables reflect the same build philosophy as all their hardware: functional, durable, and thoughtfully designed for the marine setting.</p><h3>Why Boaters Trust Sea-Dog Line</h3><ul style="list-style:disc"><li>Over 100 years of marine hardware expertise dating back to 1923</li><li>Headquarters in Everett, Washington, with a deep understanding of Pacific Northwest and offshore boating demands</li><li>A catalog of more than 2,400 products spanning virtually every marine hardware category</li><li>Products engineered for saltwater, UV exposure, and the vibration of on-water use</li><li>Trusted by recreational boaters, commercial operators, and marine riggers alike</li></ul><p>From rigging essentials to cockpit accessories and windshield systems, Sea-Dog Line remains one of the most complete and dependable marine hardware brands available today. Explore their full product range and find the right Sea-Dog components for your vessel.</p>

Part Number

420872-1
09/21/2036 8:03 AM
Sale Price

$46.10

In Stock (10+)

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Usually delivered within 2 days

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No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Sea-Dog Line 420872-1 is a high-amperage surface mount resettable circuit breaker designed for marine electrical systems. This thermal-type breaker provides reliable overcurrent protection with a 40 amp rating at 48 volts DC, making it ideal for protecting high-draw equipment and accessories on boats and marine vessels.

Key Features:

  • 40 amp capacity at 48 volts DC for heavy-duty marine applications
  • Single pole thermal breaker with 3000 ampere interrupt rating
  • Manual reset design with visible indication when tripped
  • Surface mount installation - no panel cutout required
  • Water resistant and sealed construction for engine compartments and bilge areas
  • Compact dimensions: A=2-7/8", B=1-7/8", C=1-3/4", D=2-3/16", E=1-1/16"

This circuit breaker provides essential electrical protection while offering the convenience of a resettable design. When an overload condition occurs, the breaker trips and provides a clear visual indication, allowing you to quickly identify and resolve the issue. Once the problem is corrected, simply reset the breaker to restore power. The water-resistant construction ensures reliable performance even in harsh marine environments including wet bilge areas and engine compartments.

Products specifications

Amps

40

A

No problems, eazy to use website.

Ordered tires got the product and the timely manner. Very happy.

Great product and price. Customer service and communication above and beyond. Highly recommend.

Excellent overall.

A+

Delivery was fast and always checked up on us about the package

As described and rapid delivery.

Great and easy process

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