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Blue Sea Systems 7039BSS 187-Series Thermal Circuit Breaker - Panel Mount, 50 Amp

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

7039BSS
06/01/2036 8:16 AM
Sale Price

$95.51

3 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 7039BSS is a heavy-duty thermal circuit breaker from the 187-Series line, designed to provide reliable DC circuit protection and switching functionality in a single waterproof device. Rated for 50 amps, this panel-mount breaker is engineered for marine, RV, and specialty vehicle electrical systems operating up to 48V DC.

Key Features:

  • Trip-free thermal protection prevents the breaker from being held "ON" during fault conditions
  • Waterproof and vaporproof design (IP66 rated) withstands heavy seas and power jetting
  • Clear single-lever operation with vertical/horizontal orientation indicates trip status
  • Recessed mounting holes and self-trimming case for clean, professional installation
  • Robust 5/16" (M8) terminal studs accept heavy gauge wire lugs with high torque connections
  • Round rear casing permits easy installation with standard hole saws
  • Ignition protected - safe for gasoline-powered boat installations (SAE J1171 compliant)
  • High interrupt rating: 5000A at 12V DC, 3000A at 24V DC, 1500A at 42V DC

This circuit breaker combines reliable thermal overcurrent protection with convenient manual switching, making it ideal for protecting high-amperage DC loads in harsh marine and mobile environments. The trip-free mechanism ensures safety even during fault conditions, while the waterproof construction provides long-lasting durability in demanding applications.

Products specifications

Amps

50

Mount Type

Panel

shipment came quickly, thank you.

Great checkout, and fast shipping the SPEC clutch looks great

No

Everything was proper

Smooth ordering process!

So far so good

Easy as a day of fishing on a windless day.

Super simple order with your online help. If everything shows up, I'm completely pleased!

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