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Blue Sea Systems 3120 SMS Enclosed ELCI Main Circuit Breaker Panel 50A 240V AC with Two Blank Circuit Positions

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

3120
08/02/2036 7:50 PM
Sale Price

$744.61

In Stock (5)

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Usually delivered within 2 days

free shipping

FREE SHIPPING

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No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Blue Sea Systems 3120 SMS Surface Mount System (SMS) Panel Enclosure is a purpose-built marine-grade electrical enclosure designed to house Equipment Leakage Circuit Interrupter (ELCI) main circuit breakers and other large-frame devices. Rated at 50A / 240V AC, this enclosed panel is an ideal solution for shore power protection on vessels using isolation transformers or 240V AC systems.

When installed with an ELCI main circuit breaker and positioned within 10 feet of the AC shore power inlet, the 3120 panel meets ABYC E-11 standards for marine electrical systems, providing code-compliant protection against electrical shock hazards for both onboard passengers and swimmers in surrounding waters.

Key Features:

  • Includes one pre-wired 50A / 240V AC ELCI main circuit breaker position and two blank circuit positions for custom configuration
  • Blank apertures accommodate Carling Technologies A and C Series Flat Rocker and ELCI Main circuit breakers for flexible, customizable loading
  • Glass-filled polycarbonate base delivers rugged, corrosion-resistant durability in harsh marine environments
  • Clear cover allows at-a-glance monitoring of circuit breaker status without opening the enclosure
  • Overlapping cover design adds structural strength and enhanced gasket protection against moisture and saltwater ingress
  • Oversized, seamless PUR gasket formed in place for superior waterproof sealing
  • Easily removable stainless steel hinge pin enables unobstructed panel installation
  • Stainless steel latch secures the cover firmly without penetrating the enclosure body
  • Green LEDs provide backlighting and ON indication for easy status checks in low-light conditions
  • Includes waterproof glands to maintain the integrity of wire entries
  • Stainless steel mounting hardware included

The Blue Sea Systems 3120 SMS Panel Enclosure delivers a professional-grade, weatherproof solution for managing AC shore power on board, combining safety compliance, rugged construction, and user-friendly design in a single enclosed unit.

Products specifications

Amperage

15 Amps

Dimensions

7 5/8" Width x 8 1/8" Height

Features

Waterproof

Switch Quantity

Less than 3

Type

Panel without Meters

Voltage

12 Volts DC

Above / Below Deck

Above Deck

Warranty Details

Lifetime

Came quick!

Fast shipping, item as described.

Transaction was easy

N/A

Fast checkout

Goo

Easy site to navigate. Competitive price point. Item in stock.

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