Blue Sea Systems 7148 187 Series Thermal Circuit Breaker 150 Amp Surface Mount

The Blue Sea Systems 7148 is a 150-amp thermal circuit breaker from the 187 Series, designed for surface mount installation in marine DC electrical systems. This switchable circuit breaker combines circuit protection and switching functionality into a single robust device, making it ideal for high-current applications on boats and RVs.

Key Features:

• Type III switchable design with manual reset and trip-free operation that cannot be held "ON" during fault conditions
• Thermally responsive bi-metal blade technology for reliable overcurrent protection
• Waterproof construction with thermoset polyester case for harsh marine environments
• SAE J1171 ignition protection certified—safe for gasoline-powered vessels
• Clear single-lever operation with vertical/horizontal orientation for easy trip status indication
• Recessed mounting holes provide a clean, professional appearance
• Robust 5/16" terminal studs with large clearance accept heavy gauge wire lugs and provide high torque connections

Technical Specifications:

• Current Rating: 150 Amperes
• Voltage Rating: 48 Volts DC Maximum
• Interrupt Rating: 5,000A @ 12V DC, 3,000A @ 24V DC, 1,500A @ 42V DC
• Operating Temperature Range: -25°C to +82°C (-13°F to 180°F)
• Terminal Size: 5/16" studs

This circuit breaker meets all SAE J1171 external ignition protection requirements and is suitable for protecting high-current circuits in marine, RV, and other DC power applications. The trip-free design ensures safe operation even when manually overridden during fault conditions.

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.