Brand: Blue Sea Systems
Blue Sea Systems 187-Series 40A Surface Mount Thermal Circuit Breaker, 48V DC
Blue Sea Systems 187-Series 40A Surface Mount Thermal Circuit Breaker, 48V DC
Sold out
The Blue Sea Systems 187-Series thermal circuit breaker is a surface-mount device that combines switching and circuit protection into a single, waterproof unit. Designed for reliable performance in marine environments, it features a trip-free design that prevents the switch from being held on during a fault condition.
- Amperage: 40A
- Voltage Rating: 48V DC Maximum
- Circuit Breaker Class: Type III (Switchable/Manual Reset)
- Ignition Protected: Meets SAE J1171 requirements for gasoline-powered boats
- Terminals: 5/16" studs with large clearance for heavy-gauge wire lugs
- Construction: Thermoset polyester case with recessed mounting holes
- Operation: Single lever with visual trip indication
- Operating Temperature: -25°C to +82°C
- Interrupt Rating: 5,000A at 12V DC, 3,000A at 24V DC, and 1,500A at 42V DC
Regulatory note: This product contains 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.
Product facts
- CT SKU
- CT-100441
- Model / MPN
- 7138
- UPC / GTIN
- 632085171384
- Package dimensions
- 2" X 5" X 8"
- Package weight
- 0.6 lb
- Specifications
- Amperage = 40a
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
Shipping & returns
Shipping methods, delivery estimates, and final costs appear at checkout before payment. Some bulky, supplier-shipped, or special-handling items may ship separately. See Shipping & Returns for return windows and eligibility.
Fit & compatibility
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.
Need help choosing?
Need help choosing?
Send us the product link or SKU, plus details about your boat, RV, trailer, vehicle, or project. We will help you narrow down the right option when product fit is not obvious.
