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Blue Sea Systems 6004200 Battery Switch ON/OFF with Locking Key 300A

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

6004200
08/04/2036 1:55 AM
Sale Price

$26.67

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Product Details

The Blue Sea Systems 6004200 is a single circuit ON-OFF battery switch designed for outboards and small gasoline or diesel engines. Featuring a locking key for security, this heavy-duty switch provides reliable battery isolation and theft prevention for marine and automotive applications.

Key Features:

  • 300 amp continuous rating with 500A intermittent and 900A cranking (30 sec) capacity
  • Locking key mechanism prevents unauthorized battery use
  • Tin-plated copper studs for maximum conductivity and corrosion resistance
  • Blue Sea Systems one-piece terminal stud design that never loosens over time
  • 7/8" (22mm) stud length accepts multiple 3/8" (M10) ring terminals
  • One-piece stainless steel flange nuts ensure safe and secure connections
  • Isolating rear cover protects contacts from accidental shorts
  • Breakout tabs allow wire access in any direction for flexible installation
  • Black finish for professional appearance

Specifications:

  • Switch Type: Single Circuit ON-OFF
  • Maximum Voltage: 48V DC
  • Continuous Rating: 300A
  • Intermittent Rating: 500A
  • Cranking Rating (30 sec): 900A
  • Terminal Type: 3/8" (M10) ring terminals
  • Stud Length: 7/8" (22mm)
  • Color: Black

Ideal for marine vessels, RVs, and vehicles where battery security and reliable disconnection are essential. This switch allows you to completely isolate your battery system when the vessel or vehicle is not in use, preventing battery drain and unauthorized operation.

Products specifications

Amperage

300 Amps

Dimensions

3.88" x 6.63" x 3"

Type

Lockable On Off Switches

Voltage

48 Volts DC

Cold Cranking Amps

900 Amps (30 Seconds)

ISO Approved

IP 66ISO 8846 MarincSAE J1171 MarineUL 1077UL 1500

Warranty Details

Lifetime

Great prices

Great website and good prices.

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