Blue Sea Systems 7146 187-Series 120 Amp Thermal Circuit Breaker for Marine and Vehicle 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 7146 187-Series thermal circuit breaker offers reliable circuit protection with a 120 Amp rating, designed for use in marine and vehicle electrical systems. This surface-mount device combines switching and circuit protection into a single, robust unit that ensures safe operation in demanding environments. Its thermally responsive bi-metal blade responds quickly to overcurrent conditions, providing trip-free protection that prevents the breaker from being held in the ON position during faults.
Constructed with a durable thermoset polyester case, this circuit breaker is weatherproof and suitable for installation in exposed or wet environments. It features a clear, single-lever operation for easy manual resetting and status indication, with a large lever that can be oriented vertically or horizontally. Recessed mounting holes give it a clean appearance while large clearance around the terminal studs accommodates heavy gauge wire lugs for high-torque connections. This breaker is ignition protected, making it safe for installation aboard gasoline-powered boats, and meets SAE J1171 external ignition protection requirements.
Designed for versatility, the Blue Sea 7146 provides high interrupt ratings—5,000 Amperes at 12 Volts DC, 3,000 Amperes at 24 Volts DC, and 1,500 Amperes at 42 Volts DC—ensuring reliable operation across a range of voltage levels. It operates within an ambient temperature range of -25°C to +82°C, suitable for most marine and vehicle environments. The breaker’s large, easy-to-read lever and heavy-duty terminals make it simple to install and maintain, providing long-lasting circuit protection in a compact form factor. Whether used for battery protection, accessory circuits, or critical systems, this thermal circuit breaker offers peace of mind with its robust construction and proven performance.

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 manual control

• Trip-free design prevents holding the breaker ON during faults

• Waterproof construction suitable for wet environments

• Recessed mounting holes for a clean appearance

• 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 boats