Blue Sea 7135 187 - Series Thermal Circuit Breaker - 25Amp

The Blue Sea 7135 187-Series Thermal Circuit Breaker – 25Amp is a surface-mount protection device that combines switching and circuit protection into a single compact unit for marine electrical systems. This 25-amp thermal circuit breaker is engineered to meet SAE J1171 external ignition protection requirements, making it a trusted choice for boat wiring installations where safety and reliability are non-negotiable.

The breaker's trip-free design ensures that the lever cannot be held in the "ON" position during a fault current condition—a critical safety feature that prevents bypassing protection when an overcurrent event occurs. The waterproof construction protects against the corrosive marine environment, salt spray, and bilge moisture that degrade unprotected electrical components. Clear, single-lever operation allows for intuitive switching and fast manual reset without special tools or procedures, reducing downtime when troubleshooting electrical faults on the water.

This breaker is suited for weekend anglers and serious offshore fishermen alike who rely on stable 25-amp branch circuits for navigation systems, fish finders, radios, lighting, or pump motors. Whether managing a small center console or a larger cruiser, the 7135 provides straightforward overcurrent protection without the maintenance headaches of older fuse-based systems. It's ideal for new builds, system upgrades, or replacement of failed thermal breakers in existing panels.

Blue Sea Systems is recognized across the marine industry for electrical system components that prioritize safety and durability in harsh saltwater environments. The 187-Series has become a standard in both recreational and commercial marine applications where dependable branch-circuit protection is essential.