• Blue Sea Systems 187-Series 50A Thermal Circuit Breaker (Surface Mount)
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Brand: Blue Sea Systems

Blue Sea Systems 187-Series 50A Thermal Circuit Breaker (Surface Mount)

Blue Sea Systems 187-Series 50A Thermal Circuit Breaker (Surface Mount)

$99.07
$99.07
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About this product

The Blue Sea Systems 187-Series Thermal Circuit Breaker is a 50-amp surface-mount device that combines switching and circuit protection into a single, waterproof unit. Engineered for durability, this Type III breaker features a trip-free design that cannot be held in the ON position during a fault condition, providing reliable safety for marine electrical systems.

  • Switching & Protection: Manual reset with clear single-lever operation.
  • Safety: Ignition protected (SAE J1171) for safe installation aboard gasoline-powered vessels.
  • Status Indication: Large lever can be oriented vertically or horizontally to indicate trip status.
  • Terminal Specs: Equipped with robust 5/16 in. terminals designed to accept heavy gauge wire lugs.
  • Voltage Rating: 48V DC maximum.
  • Interrupt Ratings: 5,000A at 12V DC, 3,000A at 24V DC, and 1,500A at 42V DC.
  • Operating Range: -25°C to +82°C.
  • Construction: Features a thermoset polyester case and recessed mounting holes.

Regulatory note: This product contains chemicals, including di(2-ethylhexyl)phthalate (DEHP), known to the State of California to cause cancer, birth defects, or other reproductive harm.

  • Secure checkout
  • 21-day return requests
  • Free standard shipping $100+

Product facts

CT SKU
CT-100442
Model / MPN
7139
UPC / GTIN
632085171391
Package dimensions (H × W × L)
3" X 5" X 8"
Package weight
0.57 lb
Country of origin
MEXICO

Specifications

Amperage
50a
California Proposition 65 warning
<p><img src="https://productimageserver.com/prop65/6pt.png" alt="Warning" /><strong>WARNING:</strong> 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 <a href="http://P65Warnings.ca.gov">P65Warnings.ca.gov</a>.</p>

Fit-sensitive item: confirm measurements, model numbers, and manufacturer details before ordering. Tug & Tow does not guarantee universal compatibility from a product page alone.

Shipping & returns

Request an eligible return within 21 calendar days after delivery. Every physical return requires written approval and an RMA number and must be shipped within five business days after the RMA is issued. The customer pays return shipping for an ordinary return. Tug & Tow provides prepaid return shipping for a verified damaged, defective, short, or incorrect shipment. We do not charge a restocking fee. See Shipping & Returns for eligibility, exclusions, and details.

Fit & compatibility

Review the product title, description, images, dimensions, part numbers, and manufacturer details before purchase. For fit-sensitive items, confirm compatibility with your boat, RV, trailer, vehicle, or equipment.

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