Blue Sea Systems 7146 187 Series DC Circuit Breaker 120A Surface Mount

The Blue Sea Systems 7146 is a 120 Amp thermal circuit breaker from the 187 Series Surface Mount line, purpose-built for marine DC electrical systems. It combines switching capability and overcurrent protection into a single, compact unit, simplifying panel layouts while providing reliable ignition-protected safety aboard gasoline-powered vessels.

Key Features:

• Combined switching and circuit protection in a single device for streamlined installation
• Trip Free design — cannot be held in the ON position during a fault current condition
• All components meet SAE J1171 external ignition protection requirements — safe for gasoline-powered boats
• Waterproof construction for reliable performance in harsh marine environments
• Large lever with vertical/horizontal orientation provides clear, immediate indication of trip status
• Clear, single-lever operation for intuitive switching and reset
• Robust 5/16" terminal studs deliver high-torque connections for heavy-gauge wiring
• Large clearance around terminal studs accommodates heavy gauge wire lugs
• Recessed mounting holes for a clean, professional installation appearance

Specifications:

• Amperage: 120 Amps
• 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: 5,000A @ 12V DC | 3,000A @ 24V DC | 1,500A @ 42V DC
• Operating Temperature Range: -25°C to +82°C (-13°F to +180°F)
• Part Number: 7146

The Blue Sea Systems 187 Series circuit breakers are a trusted choice for marine, RV, and DC power applications where ignition protection, durability, and dependable overcurrent protection are required.

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, visit P65Warnings.ca.gov.