A Dc Pin Cap Type is an electrical connector for supplying direct current power. Compared to domestic AC power plugs and sockets, DC connectors have many more standard types that are not interchangeable. The dimensions and arrangement of DC connectors can be chosen to prevent accidental interconnection of incompatible sources and loads. Also known as barrel connectors, DC power connectors will have current and voltage ratings specified by the manufacturer to ensure reliability in power delivery applications. Dc Pin Cap Type is very useful.