The power distribution system has the best of both worlds. We combined individual printed circuit boards on a rail system with standard automotive relay and circuit breaker technology. You get the high reliability of printed circuit boards with the in the field serviceability of readily available automotive replacement parts. We designed these circuit boards to meet stringent military specifications. They have reverse polarity protection, come with built in diagnostic LED’s, and auto reset circuit breakers. The individual boards quickly snap in and out for replacement requiring no special tools. One of the most maintenance free systems on the market.