Blue Sea Systems 7187-285 Series Thermal Circuit Breakers, Surface Mount, 48V DC, 100A

Overview

Meet the Blue Sea Systems 7187-285 Series Thermal Circuit Breakers. This compact, surface-mounted device blends circuit protection with a built-in switch, delivering a practical solution for marine electrical systems that value reliability and straightforward control. Rated for 48V DC and capable of handling up to 100A, it is well suited for demanding loads such as windlasses and electric winches where space is at a premium and clean wiring matters.

Clear status, safe operation

A visible lever clearly indicates when the breaker has tripped, enabling quick diagnosis during a voyage or after heavy use. The trip-free design ensures the handle cannot be held in the ON position when a fault is detected, reducing the risk of re-energizing a protected circuit. The ignition-protected and water-resistant build expands where you can install it, including engine rooms of gasoline-powered boats where vibrations and moisture are common.

Compatibility and protection in one

This model serves as a practical drop-in replacement for older 185-series breakers, helping you update panels with minimal rewiring. Terminal caps protect connections from accidental contact and help prevent cross-current shorts. Terminal studs are mounted on the face of the unit for easier wiring in tight compartments.

What you get

• Single unit that combines switching and circuit protection for streamlined installations
• Drop-in compatibility with 185-series breakers for easy upgrades
• Trip-free action ensures the switch cannot be held ON during a fault
• Ignition-protected and water resistant for challenging marine environments
• Five-year warranty for long-term reliability

Real-world use cases

Use this breaker to power a windlass or electric winch with built-in protection, or to manage high-current circuits in a compact panel. The surface-mount design keeps wiring neat in engine rooms, while the visible trip indicator assists routine checks during maintenance or after demanding maneuvers.

Installation notes

• Surface-mount installation with face-mounted terminals for straightforward wiring
• Connected terminal caps guard terminals and help prevent contact or shorts
• Face-mounted terminal studs simplify routing in tight spaces
• Designed for 48V DC systems up to 100A
• Rugged build with marine-grade protection to endure daily use