Blue Sea Systems 7143 187-Series 90 Amp Thermal Circuit Breaker for Marine and Automotive Applications

• Combines switching and circuit protection into a single device
  
• All components meet SAE J1171 external ignition protection requirements
  
• Clear, single lever operation
  
• Trip Free design cannot be held ON during fault current condition
  
• Waterproof
  
• Recessed mounting holes for clean appearance
  
• Large clearance around terminal studs accept heavy gauge wire lugs
  
• Robust 5/16 terminals provide high torque connections
  
• Large lever with vertical/horizontal orientation provides indication of trip status
  
• Ignition protected - safe for installation aboard gasoline powered boats

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.

The Blue Sea Systems 7143 187-Series thermal circuit breaker is a reliable safety device designed for marine, automotive, and other vehicular electrical systems. With a 90 Amp capacity, this breaker combines switching and circuit protection into a single, compact unit, simplifying installation and maintenance. Crafted with a thermoset polyester case and a thermally responsive bi-metal blade, it provides dependable performance across a wide temperature range, from -25°C to +82°C. This circuit breaker features a trip-free design that prevents it from remaining in the ON position during a fault current, ensuring safety during electrical overloads or short circuits. Its waterproof construction and recessed mounting holes offer a clean appearance and robust installation, suitable for demanding environments.
Large clearance around terminal studs allows for heavy gauge wire lugs, and the robust 5/16-inch terminals facilitate high-torque connections for secure wiring. The large lever with vertical or horizontal orientation provides a clear indication of trip status, enhancing ease of use. All components meet SAE J1171 external ignition protection standards, making it safe for installation aboard gasoline-powered boats. The switch includes a clear, single lever operation that ensures quick manual reset after tripping, maintaining system safety and functionality. This breaker is rated for up to 48 volts DC, with interrupt ratings of 5,000 amperes at 12 volts DC, 3,000 amperes at 24 volts DC, and 1,500 amperes at 42 volts DC, making it suitable for high-current applications.
Designed for durability and safety, the Blue Sea Systems 7143 circuit breaker is an essential component for protecting electrical circuits in marine, RV, and automotive systems. Its rugged construction and reliable trip mechanism help prevent electrical damage and ensure safe operation in challenging environments. Installation is straightforward with recessed mounting holes and large terminal openings, supporting heavy gauge wiring for high-current loads. Whether used for main power distribution or auxiliary circuits, this breaker provides peace of mind with its high-quality build and adherence to industry standards.

Features:

• Combines switching and circuit protection into a single device

• All components meet SAE J1171 external ignition protection requirements

• Clear, single lever operation for easy reset and status indication

• Trip-free design prevents holding ON during fault conditions

• Waterproof construction for marine and outdoor applications

• Recessed mounting holes for a clean installation

• Large clearance around terminal studs to accept heavy gauge wire lugs

• Robust 5/16-inch terminals for high torque connections

• Large lever with vertical/horizontal orientation indicating trip status

• Ignition protected for safe installation aboard gasoline-powered vessels