Blue Sea Systems 187 Series, 285 Series & Klixon Circuit Breakers 50A DC Surface Mount circuit breaker combines switching and circuit protection into a single device "Trip Free" design cannot be held "ON" during fault current condition Rated IP66 Waterproof Max voltage: 48V DC, Interrupt capacity: 5000A @12V, 3000A @ 24V, 1500A @ 42V Terminal Size: 5/16"-18