Coaxial power connector
（重定向自Barrel connector）
![A common coaxial power connector, male and female, 5.5 x 2.5 mm](/Images/godic/202412/23/Hohlstecker_und_Hohlbuchse_5,5x2,50759.jpg")
![Common DC power connectors](/Images/godic/202412/23/Photo-RoundPowerConnectors0759.jpg")
![Some common DC power connectors](/Images/godic/202412/23/Klinken-_und_Hohlstecker0759.jpg")
![Lock-ring DC coaxial connectors. The knurled barrel allows the plug to be secured to jacks that have mating male threads.](/Images/godic/202412/23/Lock-Ring_Connectors0759.jpg")
A coaxial power connector is an electrical power connector used for attaching extra-low voltage devices such as consumer electronics to external electricity. Also known as barrel connectors, concentric barrel connectors or tip connectors, these small cylindrical connectors come in an enormous variety of sizes.