Blue Sea Systems 7048 187 Series Thermal Circuit Breaker - Panel Mount, 150 Amp

The Blue Sea Systems 7048 is a 150-amp thermal circuit breaker from the 187 Series, designed to combine switching and circuit protection into a single robust device for marine DC electrical systems. This panel-mount breaker features a trip-free design that cannot be held in the "ON" position during fault conditions, ensuring reliable protection for high-amperage circuits up to 48 volts DC.

Key Features:

• 150-amp capacity with Type III switchable/manual reset, trip-free operation
• Thermally responsive bi-metal blade mechanism for reliable overcurrent protection
• Waterproof construction with ignition-protected components meeting SAE J1171 requirements
• Self-trimming thermoset polyester case with recessed mounting holes for clean, professional appearance
• Round case design allows easy installation with standard hole saw
• Robust 5/16" terminal studs with large clearance for heavy gauge wire lugs and high-torque connections
• Large, easy-to-operate lever with clear trip status indication in vertical or horizontal orientation
• Safe for installation on gasoline-powered vessels with ignition protection

Technical Specifications:

• Maximum voltage rating: 48 Volts DC
• Interrupt rating: 5,000 amperes at 12V DC, 3,000 amperes at 24V DC, 1,500 amperes at 42V DC
• Operating temperature range: -13°F to 180°F (-25°C to +82°C)
• All components meet SAE J1171 external ignition protection standards

This circuit breaker is ideal for protecting high-current circuits in marine applications including windlasses, thrusters, inverters, and other heavy-duty electrical loads. The single-lever operation provides convenient manual switching while maintaining automatic overload protection.