Adafruit
USB to 2.1mm Male Barrel Jack Cable [22AWG 1 meter]
This USB to 2.1 mm barrel jack cable lets you power 5 V DC devices from any USB port. Simply connect the USB-A end to a computer, USB wall adapter, or USB ba...
This USB to 2.1 mm barrel jack cable lets you power 5 V DC devices from any USB port. Simply connect the USB-A end to a computer, USB wall adapter, or USB battery pack, and the barrel jack end to your device. At 1 metre long with 22 AWG wires, it handles higher current draws reliably.
The barrel jack is centre-positive with a 5.5 mm outer / 2.1 mm inner diameter — the most common DC barrel jack size used in electronics and single-board computers.
Key Features
- USB-A to 2.1 mm Barrel Jack – Converts USB power to DC barrel jack
- 22 AWG Wires – Thicker gauge for higher current capacity
- 1 Metre Length – Convenient cable length for bench and project use
- Centre Positive – Standard polarity for most 5 V DC devices
Specifications
- Input Connector – USB Type-A
- Output Connector – 5.5 mm / 2.1 mm DC barrel jack (male, centre positive)
- Wire Gauge – 22 AWG
- Cable Length – 1 metre
- Output Voltage – 5 V DC (from USB source)
Ideal For
- Powering single-board computers from USB
- Portable power setups with USB battery packs
- Bench testing DC-powered devices
- Replacing wall adapters with USB power sources
Jargon buster
Plain-language definitions for the technical terms used above.
- AWG
- American Wire Gauge is a numbering system for wire thickness, where a lower number means a thicker wire. The AWG rating matters because thicker wire can usually carry more current with less voltage drop and heating.
- DC barrel jack
- A round power connector commonly used for low-voltage DC power supplies, often described by its outer and inner diameters such as 5.5 x 2.1 mm. Matching the barrel size and polarity is important so the plug physically fits and powers the device correctly.
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