Blue Sea Systems 7185 285-Series 48V DC Thermal Circuit Breaker, 70A Surface-Mount Trip-Free

Blue Sea Systems 7185 is a surface-mounted thermal circuit breaker that combines a manual switch with automatic trip protection for 48V DC systems up to 70A.

This compact 285-series breaker is designed for medium-duty marine and mobile power applications where space, reliability and simple installation matter. It functions as both a switch and a protective device, with a visible trip lever, ignition protection, and water resistance so it can be mounted in many onboard locations. Built with user-friendly terminal studs and protective terminal caps, the 7185 is especially suited for windlass, electric winch and general DC circuit service.

How does this breaker protect my 48V DC circuit?

The thermal element inside senses excess current and trips the breaker to interrupt power, while the mechanism also serves as a manual on/off switch. If a fault occurs the trip-free design prevents the handle from being held on, ensuring the circuit remains open until the issue is resolved.

• Thermal trip responds to prolonged overloads rather than brief surges
• Visible lever indicates a tripped condition for quick diagnosis
• Trip-free mechanism prevents bypassing the protective function
• Rated for 48V DC, continuous service up to 70A

Where can I mount the 7185 and how do I connect it?

The breaker is surface-mounted with terminal studs on the face for straightforward wiring and secure connections. Terminal caps are supplied to reduce accidental contact and lower the risk of shorts from loose or nearby conductors.

• Surface-mount design for bulkheads, panels, or equipment frames
• Face-mounted studs simplify routing and torque access
• Connected caps protect terminals from contact and stray wires
• Water resistant and ignition protected for engine-room use

Is this product suitable for marine windlass and winch systems?

Yes — the 7185 is specifically made to serve medium-duty applications such as windlasses and electric winches where manual control and dependable overload protection are needed. Its construction supports repeated switching and robust performance under typical marine loads.

• Medium-duty rating aligns with common windlass and winch currents
• Manual switch function enables convenient on/off control at the helm or deck
• Visible trip lets operators quickly see faulted circuits
• Ignition protection allows installation near gasoline-engine spaces

What warranty and replacement compatibility should I expect?

Blue Sea Systems backs this breaker with a five-year warranty to support long-term installation confidence. The 7185 is a drop-in replacement for the earlier 185 series, allowing upgrades without rewiring in many setups.

• Five-year limited warranty from Blue Sea Systems
• Direct replacement compatibility with 185-series breakers
• Terminal stud layout designed for common panel footprints
• Serviceable design simplifies swap-outs and maintenance

Who is this for: The 7185 285-Series thermal breaker is aimed at boat owners, marine electricians, and mobile-power technicians who need a reliable, easy-to-install 48V DC protective switch for medium-duty loads like windlasses, winches, battery banks and accessory circuits. If you want clear trip indication, ignition protection for engine-room placement, and terminal protection to reduce shorts, this breaker offers a practical combination of switching and safety backed by a five-year warranty.