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Blue Sea Systems 4321 Water-Resistant 4-Position Circuit Breaker Panel with 12V Socket and Dual USB Charger

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

4321
06/01/2036 1:42 AM
Sale Price

$83.53

4 left at this price

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Usually delivered within 2 days

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No Hassle Returns

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Fitment guaranteed

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Product Details

The Blue Sea Systems 4321 is a compact, water-resistant circuit breaker switch panel designed for marine, RV, and powersports applications where reliable power distribution and device charging are essential. This panel combines four independent circuit breaker switches with a 12V accessory socket and dual USB charging ports, providing comprehensive power management in a single, space-efficient unit.

Key Features:

  • Four individual circuit breaker switches for independent control of electrical circuits
  • Water-resistant construction with sealing and drainage features for harsh marine and outdoor environments
  • Integrated 12V accessory socket for powering portable devices and accessories
  • Dual USB charging ports for convenient charging of smartphones, tablets, and other USB devices
  • Compact design ideal for mounting in limited spaces on boats, RVs, or off-road vehicles
  • Circuit breakers provide overload protection and eliminate the need for inline fuses
  • Ignition-protected design meets USCG and ABYC safety standards for marine installations

This panel is perfect for adding switched power control and modern charging capabilities to any 12V DC electrical system. The circuit breakers reset easily after tripping, while the water-resistant design ensures reliable operation in wet conditions. Ideal for controlling cabin lights, navigation equipment, bilge pumps, or accessory circuits while keeping mobile devices charged and ready.

Products specifications

Color

Gray

Positions

4 +12V +Dual USB

Size

4-5/8" W x 6-5/8" H

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