Blue Sea Systems 7138 187-Series 40 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 7138 187-Series thermal circuit breaker is a reliable and compact solution designed for marine, automotive, and other DC electrical systems. This surface-mount device combines circuit protection and switching functions in a single unit, simplifying installation and maintenance. Its robust thermoset polyester case ensures durability in harsh environments, while the waterproof design provides added protection against moisture and water ingress. The large, easy-to-operate lever can be oriented vertically or horizontally, allowing for clear trip status indication and flexible mounting options. The recessed mounting holes contribute to a clean appearance, making it suitable for applications where aesthetics matter.
Built to meet SAE J1171 external ignition protection standards, this circuit breaker is safe for installation on gasoline-powered boats and other combustible environments. The trip-free design ensures that the breaker cannot be held in the ON position during a fault condition, preventing potential damage or safety hazards. Heavy-gauge terminal studs with large clearance and high-torque terminals accommodate heavy wire lugs, facilitating secure connections for high-current circuits. Its switchable, manual-reset class makes it easy to reset after a trip, restoring power once the fault has been addressed.
The Blue Sea 7138 features a thermally responsive bi-metal blade that responds quickly to overloads, with an interrupt rating of up to 5,000 amperes at 12 volts DC. It operates efficiently within a temperature range of -25°C to +82°C, ensuring reliable performance across various climates. The device is rated for a maximum of 48 volts DC, making it suitable for a wide range of electrical systems. Overall, this circuit breaker provides a dependable and safety-conscious option for protecting electrical circuits in demanding environments.

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 status monitoring

• Trip-free design prevents holding ON during fault conditions

• Waterproof construction for reliable operation in wet environments

• Recessed mounting holes for a clean installation appearance

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

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

• Large lever with vertical/horizontal orientation indicates trip status

• Ignition protected for safe installation aboard gasoline-powered boats