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 90 Amp Thermal Circuit Breaker combines reliable circuit protection with convenient switching in a compact, waterproof design. Engineered for marine and automotive environments, this surface mount breaker features a thermally responsive bi-metal blade that automatically trips during overloads, ensuring safety and system integrity. Its robust thermoset polyester case and heavy-gauge terminal studs support high torque connections, accommodating heavy-duty wiring and providing secure, corrosion-resistant installation. The large, easily accessible lever indicates trip status clearly and can be oriented vertically or horizontally to suit installation preferences. Designed with recessed mounting holes, the breaker maintains a clean appearance and prevents accidental disconnections, making it ideal for engine compartments, boats, and off-road vehicles. All components meet SAE J1171 external ignition protection standards, ensuring safe installation in gasoline-powered equipment. The breaker’s waterproof construction and trip-free design prevent it from being held in the ON position during a fault condition, promoting system safety and compliance with industry standards. It is rated for a maximum voltage of 48 volts DC and can interrupt currents up to 5,000 amperes at 12 volts DC, providing ample protection for high-current circuits. Operating effectively within temperature ranges from -25°C to +82°C, the Blue Sea 7143 breaker offers durability and reliability in demanding environments. Its combination of switchable and manual reset features make it suitable for various applications where quick reset after fault clearance is required. Whether used in marine, automotive, or off-road systems, this circuit breaker ensures robust protection, easy operation, and a professional appearance, backed by Blue Sea Systems' reputation for quality and safety.

Features:

• Combines switching and circuit protection into a single device

• Meets SAE J1171 external ignition protection requirements

• Clear, single lever operation for easy trip status indication

• Trip free design prevents holding ON during fault conditions

• Waterproof construction for reliable use in harsh environments

• Recessed mounting holes for a clean installation appearance

• Large clearance around terminal studs for heavy gauge wire lugs

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

• Large lever with vertical/horizontal orientation indicates trip status

• Ignition protected for safe installation aboard gasoline-powered boats