Sea-Dog 420844-1 Resettable Inline Circuit Breaker, 40 Amp, 12/24 Volt, No Cover

The Sea-Dog 420844-1 is a 40 amp resettable inline circuit breaker built for higher-amperage marine accessories that need reliable overload protection. Rather than replacing a blown fuse, this breaker trips on overload and can be reset with its manual reset button, saving a trip to the parts locker. It is ignition protected, so it is safe to install aboard gasoline powered boats, and it can be wired into either 12VDC or 24VDC systems.

Construction is injection molded nylon and polycarbonate housing over stamped brass hardware, with #10-32 studs and nuts for the electrical connections. The copper-colored post is the battery, or "power in", connection, and the silver post is the auxiliary, or "power out", protected connection, making correct wiring straightforward. This version (420844-1) ships without the splash proof breaker cover; a matching cover is available separately as a different part number for installations that need splash protection. The breaker complies with SAE standard J553 and SAE J1171.

Specifications

• Brand: Sea-Dog
• Manufacturer Part Number: 420844-1
• Current Rating: 40 Amps
• Voltage: 12 or 24 Volts
• Circuit Breaker Type: Resettable, manual reset
• Mounting Type: Panel mount
• Number of Poles: 1
• Terminal Studs: #10-32 stamped brass studs with nuts
• Dimension A: 1-5/16 inches
• Dimension B: 1-7/16 inches
• Dimension C: 1-3/8 inches
• Dimension D: 7/8 inch
• Weight: 0.06 pounds
• Material: Injection molded nylon and polycarbonate housing, stamped brass studs
• Breaker Cover: Not included, sold separately
• Ignition Protection: Ignition protected
• Compliance: SAE J553, SAE J1171
• Standard Pack: 10 each
• UPC: 035514420747

Frequently Asked Questions

How many amps is the Sea-Dog 420844-1 rated for? The Sea-Dog 420844-1 is rated at 40 amps, making it suited to higher-amperage accessories that need dedicated overload protection.

Does this breaker work on both 12 volt and 24 volt systems? Yes, the 420844-1 can be used on either 12VDC or 24VDC marine electrical systems.

Is a cover included with the 420844-1? No, the 420844-1 ships without a cover. A splash proof breaker cover is available as a separate part for installations that need it.

Can this circuit breaker be installed on a gasoline powered boat? Yes, the Sea-Dog 420844-1 is ignition protected, which makes it safe for installation aboard gasoline powered boats.

What is the breaker housing made of? The 420844-1 uses an injection molded nylon and polycarbonate housing with stamped brass #10-32 studs and nuts for the electrical terminals.

How do I know which terminal is power in versus power out? On the Sea-Dog 420844-1, the copper-colored post is the battery, or power in, connection, and the silver post is the auxiliary, or power out, protected connection.

What happens when the breaker trips? The 420844-1 is resettable: after an overload trips the breaker, it can be restored with the manual reset button rather than needing a replacement part.

What are the overall dimensions of the 420844-1? The Sea-Dog 420844-1 measures 1-5/16 inches by 1-7/16 inches by 1-3/8 inches, with a 7/8 inch dimension noted for the fourth measurement.

How much does the 420844-1 weigh? The Sea-Dog 420844-1 weighs 0.06 pounds.

What safety standards does this circuit breaker meet? The 420844-1 complies with SAE standard J553 and SAE J1171.

Is this a single-pole or multi-pole breaker? The Sea-Dog 420844-1 is a single-pole (1 pole) circuit breaker.

Can I buy the matching breaker cover separately? Yes, a splash proof breaker cover is sold separately from the Sea-Dog 420844-1 as its own part number.