This 2.1mm female DC barrel jack is a standard PCB mount power connector designed for use with common 2.1mm DC power adapters. It is ideal for DIY electronics, embedded systems, Arduino compatible projects, battery powered devices and custom power distribution boards.

Looking for a compatible power supply?View our range of 2.1mm DC power supplies.

The connector features a 2.1mm center hole and a three pin switched design, allowing automatic power source selection between a wall adapter and a battery supply.

How the Switched Pins Work

This jack includes three terminals:

• Pin 1 exits from the rear of the jack and connects to the centre pin
• Pin 2 exits from the bottom and connects to the outer sleeve
• Pin 3 exits from the side and is internally switched

When no plug is inserted, pins 2 and 3 are internally connected. When a DC plug is inserted, pin 3 is automatically disconnected.

This makes it easy to design circuits that run from a battery by default and automatically switch to a wall adapter when connected.

Features

• 2.1mm female DC barrel jack
• PCB mount through hole design
• 3 pin switched configuration
• Standard centre positive compatible layout
• Durable black insulated housing
• Dimensions: 13.8mm x 10.8mm x 8.9mm

Applications

• Arduino and microcontroller projects
• Custom PCB power input
• Battery backup systems
• DIY electronics enclosures
• Replacement power jack repairs

Compatibility

Compatible with standard 2.1mm DC barrel plugs and power supplies, including 12V and 5V adapters commonly used in electronics projects.

Related Products

• 2.1mm Female DC Barrel Jack with Terminals
• 2.1mm Male DC Barrel Plug with Terminals