This is a standard 5.5 mm x 2.1 mm female DC supply connector, and it is often referred to as a barrel DC connector. It is basically a low-voltage DC input power connector. In power delivery applications, it can be mounted on an appliance or on a PCB and connected to a 2.1 mm male power connector, which supplies power from a power supply.

Specifications:

• Plug Type: PCB Mount 5.5x 2.1mm
• Contact Resistance: 0.05Ohm
• Maximum Rated Input Current: 2.5A
• Maximum Input Voltage: 30V
• Insulating Resistance: 0.1Ohm @ 500VDC
• Operating Temperature: -25 to 85 Degree C