Blue Sea Systems 187-Series Thermal Circuit Breaker - 135A - 48V DC

Ensure superior electrical system integrity and safety aboard your vessel with the Blue Sea Systems 187-Series Thermal Circuit Breaker. Engineered for demanding marine applications, this 135A, 48V DC breaker combines reliable circuit protection with convenient switching in a single, robust device. Its ignition-protected design makes it safe for installation on gasoline-powered boats, meeting SAE J1171 external ignition protection requirements. Upgrade your boat's electrical defense today for peace of mind on the water.

• Integrated Protection & Switching: Combines circuit protection and manual switching into one unit, simplifying your electrical panel.
• Ignition Protected: Meets SAE J1171 standards, ensuring safe installation on gasoline-powered boats and minimizing fire risk.
• "Trip Free" Design: Prevents the breaker from being held ON during a fault current condition, enhancing safety and system reliability.
• Waterproof Durability: IP66 rated, the robust thermoset polyester case is sealed against water from heavy seas and harsh marine environments.
• Simplified Installation: Features a self-trimming case with recessed mounting holes and a round form factor, allowing for clean panel installation with a standard hole saw.
• High-Torque Terminals: Robust 5/16"-18 terminal studs accept heavy gauge wire lugs and provide high-torque connections for secure and efficient power transfer.
• Clear Status Indication: A large lever with vertical/horizontal orientation provides immediate visual indication of the breaker's trip status.

• Amperage Rating: 135 Amperes.
• Maximum Voltage: 48 Volts DC.
• Interrupt Rating: 5,000 Amperes @ 12 Volts DC; 3,000 Amperes @ 24 Volts DC; 1,500 Amperes @ 42 Volts DC.
• Operating Temperature: -25°C to +82°C.
• Case Material: Thermoset Polyester.

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.