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Blue Sea Systems 7146 187 Series DC Circuit Breaker 120A Surface Mount

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

7146
06/01/2036 11:34 AM
Sale Price

$95.33

2 left at this price

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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 7146 is a 120 Amp thermal circuit breaker from the 187 Series Surface Mount line, purpose-built for marine DC electrical systems. It combines switching capability and overcurrent protection into a single, compact unit, simplifying panel layouts while providing reliable ignition-protected safety aboard gasoline-powered vessels.

Key Features:

  • Combined switching and circuit protection in a single device for streamlined installation
  • Trip Free design — cannot be held in the ON position during a fault current condition
  • All components meet SAE J1171 external ignition protection requirements — safe for gasoline-powered boats
  • Waterproof construction for reliable performance in harsh marine environments
  • Large lever with vertical/horizontal orientation provides clear, immediate indication of trip status
  • Clear, single-lever operation for intuitive switching and reset
  • Robust 5/16" terminal studs deliver high-torque connections for heavy-gauge wiring
  • Large clearance around terminal studs accommodates heavy gauge wire lugs
  • Recessed mounting holes for a clean, professional installation appearance

Specifications:

  • Amperage: 120 Amps
  • Circuit Breaker Class: Type III — Switchable / Manual Reset / Trip Free
  • Type: Thermally Responsive Bi-Metal Blade
  • Case Material: Thermoset Polyester
  • Voltage Rating: 48 Volts DC Maximum
  • Interrupt Rating: 5,000A @ 12V DC | 3,000A @ 24V DC | 1,500A @ 42V DC
  • Operating Temperature Range: -25°C to +82°C (-13°F to +180°F)
  • Part Number: 7146

The Blue Sea Systems 187 Series circuit breakers are a trusted choice for marine, RV, and DC power applications where ignition protection, durability, and dependable overcurrent protection are required.

Warning WARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (DEHP), which is known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit P65Warnings.ca.gov.

Products specifications

Amps

120

Mount Type

Surface

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