Blue Sea Systems 7039 187 Series Panel Mount Circuit Breaker 50 Amp

The Blue Sea Systems 7039 is a 50-amp thermal circuit breaker from the 187 Series, designed for panel mount installation in marine DC electrical systems. This waterproof circuit breaker combines switching and circuit protection into a single device, providing reliable overcurrent protection up to 48 volts DC.

Key Features:

• Trip-free design prevents the breaker from being held in the "ON" position during fault conditions
• Single lever operation with clear vertical/horizontal orientation for easy trip status indication
• Ignition protected construction meets SAE J1171 requirements for safe installation on gasoline-powered boats
• Self-trimming case eliminates the need for mounting panels or trim bezels
• Round case design allows easy installation with standard hole saws
• Recessed mounting holes provide a clean, professional appearance
• Robust 5/16-inch terminal studs with large clearance accept heavy gauge wire lugs and provide high torque connections
• Waterproof construction suitable for harsh marine environments

Technical Specifications:

• Circuit Breaker Class: Type III - Switchable/Manual Reset, Trip Free
• Type: Thermally responsive bi-metal blade
• Case Material: Thermoset polyester
• Voltage Rating: 48 volts DC maximum
• 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)

This circuit breaker is ideal for protecting high-current DC circuits in boats, RVs, and other marine or mobile applications where reliable overcurrent protection is essential.