3 Pin DC Barrel Power Jack ( Pack of 5 )
A DC connector (or DC plug, for one common type of connector) is an electrical Converter for supplying direct current (DC) power.
Compared to domestic AC Power pligs & 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. Types vary from small coaxial connectors used to power portable electronic devices from AC adapter, to connectors used for automotive accessories and for battery packs in portable equipment.