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Blue Sea Systems 7443 UL-489 Circuit Breaker 20A DC Flat Rocker

Manufacturer

Blue Sea Systems

<p>When electrical reliability can mean the difference between a successful voyage and a dangerous situation, marine professionals and enthusiasts turn to Blue Sea Systems. Founded in 1992, this American manufacturer has built a reputation for creating electrical components specifically engineered to withstand the unforgiving marine environment. Every product reflects a commitment to safety standards and real-world performance that has made Blue Sea Systems a leading name in marine and specialty vehicle electrical systems.</p> <h3>Engineering for the Marine Environment</h3> <p>Blue Sea Systems develops and manufactures dependable AC and DC electrical products for marine and specialized vehicle applications, designed in the USA and engineered to excel in challenging environments. The marine environment presents unique challenges—salt spray, constant vibration, temperature extremes, and moisture exposure—that can quickly degrade inferior electrical components. Blue Sea Systems addresses these challenges through careful material selection, rigorous testing protocols, and designs that prioritize both safety and serviceability. Their components are engineered for marine use and align with the intent of ABYC E-11: AC and DC Electrical Systems on Boats and relevant USCG electrical regulations.</p> <h3>Commitment to Safety Standards</h3> <p>Safety standards aren't just guidelines for Blue Sea Systems—they're fundamental to every product design. All Blue Sea Systems marine battery disconnect switches comply with the ABYC C-7 certification, demonstrating their commitment to meeting and exceeding industry safety requirements. The company maintains ABYC-certified employees across multiple departments, from engineering to technical support, ensuring deep expertise in marine electrical system design and installation standards.</p> <h3>Comprehensive Product Range</h3> <p>Blue Sea Systems offers an extensive catalog designed to address every aspect of marine electrical systems. Their <a href="/7262-blue-sea-systems-circuit-breakers-200260">circuit breakers</a> provide resettable overcurrent protection with trip-free designs and clear trip indication for quick diagnostics. For power management, their <a href="/7262-blue-sea-systems-battery-switches-manual-200149">battery switches</a> offer reliable methods for controlling battery banks and disconnecting loads during storage or emergencies, with ABYC C-7 compliance guaranteed.</p> <p>Monitoring system health is critical aboard any vessel, which is why their <a href="/7262-blue-sea-systems-battery-monitors-volt-meters-200146">battery monitors and volt meters</a> provide accurate real-time data to help operators make informed decisions about power usage and charging. The company's <a href="/7262-blue-sea-systems-terminal-blocks-bus-bars-201059">terminal blocks and bus bars</a> create organized, serviceable connection points that simplify installation and future modifications. For keeping batteries properly charged, Blue Sea Systems offers <a href="/7262-blue-sea-systems-battery-chargers-200141">battery chargers</a> engineered with features like automatic charging relay compatibility and proper charge profile management.</p> <h3>Built by Boaters, for Boaters</h3> <p>Blue Sea Systems was founded based on a commitment to create innovative high quality marine electrical products to improve the safety, simplicity, and reliability of boating, with employees who are active boaters applying their passion to designing, developing, and building products. This firsthand experience translates into practical features like modular layouts, standardized footprints, and installer-centric designs that streamline panel work and serviceability. The result is a product line that addresses real challenges faced on the water, backed by comprehensive technical documentation and support resources that help both professionals and DIY enthusiasts complete installations with confidence.</p>

Part Number

7443
06/01/2036 8:11 AM
Sale Price

$36.07

In Stock (10)

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Usually delivered within 2 days

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Product Details

The Blue Sea Systems 7443 is a UL-489 certified 20-amp DC circuit breaker designed for marine and military applications where stringent safety standards are required. This single-pole breaker features a flat rocker actuator for easy panel mounting and operation, making it ideal for Navy, Army, Coast Guard vessels, and other craft covered under CFR 46 regulations.

Key Features:

  • UL-489 listed magnetic hydraulic circuit breaker with trip-free operation
  • 20-amp current rating for DC circuits up to 80 volts
  • Flat rocker actuator style for clean, professional panel installation
  • High interrupt capacity of 10,000 amps for robust circuit protection
  • Tin-plated brass terminals with #10-32 screw connections resist corrosion in marine environments
  • Single pole design for straightforward wiring and space-efficient mounting

This trip-free circuit breaker cannot be held in the closed position during an overload condition, ensuring reliable protection for critical electrical systems. The magnetic hydraulic design provides precise, temperature-compensated protection that won't be affected by ambient heat. Ideal for protecting DC electrical panels, battery systems, and power distribution on vessels requiring UL-489 certification.

so far good

B

Easy - Quick - Right Price!!!!

Quick

Item as as described and delivered on time

It went ok.

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Got what I ordered pretty quick and good price

Found what I needed right away

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