Blue Sea 6004200 Single Circuit ON-OFF w/Locking Key - Black
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Estimated Delivery:Oct 17 - Oct 21
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Free Shipping: On all orders over $150
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Blue Sea 6004200 Single Circuit ON-OFF w/Locking Key - Black
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Blue Sea 6004200 Single Circuit ON-OFF w/Locking Key - Black
Blue Sea 6004200 Single Circuit ON-OFF w/Locking Key offers reliable power control tailored for your outboards and small gasoline or diesel engines. With a continuous rating of 300 Amps, this switch ensures maximum performance and safety in demanding marine conditions.
Key Features:
- High-Quality Construction: Tin-plated copper studs provide maximum conductivity and corrosion resistance.
- Versatile Compatibility: Accepts 3/8" (M10) ring terminals, making installation quick and easy.
- Secure Connections: One-piece stainless flange nuts ensure connections are safe and won’t loosen over time.
Ideal for marine enthusiasts, boat owners, and outdoor adventurers, this product is supported by Blue Sea Systems’ commitment to quality, ensuring you can trust its durability and performance. With an isolating cover that protects rear contacts and breakout tabs for versatile wire access, the Blue Sea 6004200 is essential for safe electrical management in your vessel.

WARNING: This product can expose you to chemicals including di(2-ethylhexyl)phthalate (DEHP), known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit P65Warnings.ca.gov.
Single Circuit ON-OFF with Locking Key - Black300 Amps continuous rating for outboards and small gasoline or diesel engines
- Tin-plated copper studs for maximum conductivity and corrosion resistance
- Studs accept 3/8" (M10) ring terminals
- 7/8" (22 mm) stud length accepts multiple cable terminals
- Blue Sea Systems one-piece terminal stud design never loosens over time
- One-piece stainless flange nuts ensure safe and secure connections
- Isolating cover protects rear contacts
- Breakout tabs allow wire access in any direction
Specifications:
- Switch Type: Single Circuit ON-OFF
- Color: Black
- Maximum Voltage: 48V DC
- Continuous Rating: 300A
- Intermittent Rating: 500A
- Cranking Rating 30 sec: 900A
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 go to P65Warnings.ca.gov.
Shipping Policy
Thank you for choosing Outdoors.Supply. We aim to deliver your gear efficiently and reliably.
Carriers
We ship all orders via UPS Ground or FedEx Ground, depending on availability and destination.
Shipping Rates
- Orders under $150: Flat shipping rate of $15
- Orders $150 and above: Free shipping
Note: A handling fee of $7.50 may apply to certain items. If applicable, it will be clearly stated during checkout.
Order Processing
- Orders placed before 12:00 PM ET (Monday–Friday): Processed the same business day
- Orders placed after 12:00 PM ET or on weekends/holidays: Processed the next business day
Delivery Time
All orders are delivered within 3–7 business days from the date of shipment, depending on your location.
For any questions or concerns about your order, please contact us at [hello@outdoors.supply]. We’re here to help!
Discover more in our FAQ
How long does it take to process an order?
All orders are processed the same business day if placed before 12 PM EST. Orders placed after 12 PM EST are processed the following business day.
Do you ship internationally?
No! Currently we are only supporting shipments to contiguous United States. We do not ship to PO Boxes or Internationally.
What is your return policy?
No Returns
Due to the nature of our products and our commitment to ensuring the highest quality standards, we do not accept any returns under any circumstances.
No Refunds
We do not offer refunds for any reason, including but not limited to:
- Change of mind
- Incorrect size or style ordered
- Delayed shipping
- Product dissatisfaction
Please refer to our Refund Policy
What are your sizing options?
We have a size chart displayed on most products to reflect the sizing as accurate as possible. Please review the size chart and ensure you are leveraging the closest size possible.
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Why You'll Love Blue Sea 6004200 Single Circuit ON-OFF w/Locking Key - Black
Premium Quality
Blue Sea Systems is known for exceptional quality and attention to detail in every product.
Fast Shipping
Fast and reliable shipping to get your Blue Sea 6004200 Single Circuit ON-OFF w/Locking Key - Black to you quickly.
Satisfaction Guarantee
Backed by our comprehensive warranty for complete peace of mind.
Expert Support
Our dedicated support team is here to help with any questions about Blue Sea 6004200 Single Circuit ON-OFF w/Locking Key - Black.