Blue Sea Systems A-Series DC Double Pole Toggle Circuit Breaker 

Double pole, magnetic-hydraulic, trip free circuit breakers. Combines switching and circuit protection into a single device. Allows for the neutral circuit on one pole and hot circuit on other pole. Both poles will trip if either pole trips. Rated for 250 Volts AC and 65 Volts DC. Includes mounting screws.

Amps: 50