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Black USB-A to 5.5 x 2.1 mm barrel power cable, 100 cm long

eForChina

eForChina USB Male to DC 5.5 x 2.1mm Power Cable 100cm

SKU CH-KMNF-Z7G9V

Connects a 5.5 × 2.1 mm barrel device to a USB port for 5 V power over 100 cm

  • Adapter typePower Adapter
  • Power small devices directly from any USB port
  • Delivers 5 V DC output for compatible electronics
  • Fits 5.5 mm × 2.1 mm barrel jack connectors
  • 100 cm cable length gives flexible placement
  • Simple plug-and-play power adapter for portable use

USB to DC 5.5 × 2.1mm cable

This cable connects a standard USB-A port to a 5.5 mm outer-diameter barrel jack with a 2.1 mm centre pin. It draws 5 V DC from the USB source and delivers it to the device. The lead is 100 cm long and is sold new.

Suits low-power gear with a matching barrel socket

Ideal for powering small electronics such as routers, LED strips, Arduino boards or portable speakers that accept 5 V through a 5.5 × 2.1 mm connector. Not suitable for devices that need a higher voltage, a different barrel size, or more current than the host USB port can supply.

Barrel dimensions are 5.5 mm outer and 2.1 mm inner

The connector’s 5.5 mm outer diameter and 2.1 mm inner diameter are the only specification that determines physical compatibility. Verify that the target device uses exactly this jack size before purchasing.

How it compares

Measured against everything we stock in Other Adapters & Couplers, at today’s prices. Recalculated every night.

Price $4.99
Cheaper than about 93% of the 1,761 comparable items (median $18.99).

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Specifications

Product
Adapter typePower Adapter

Questions about this item

How do I connect the USB male end and the 5.5 x 2.1mm barrel plug to power my device?

Insert the USB male plug into any standard USB‑A port that supplies 5 V, then push the 5.5 x 2.1mm barrel connector firmly into the device's DC jack until it seats fully; the 100cm cable length allows flexible placement.

Will the cable or connectors wear out and need replacement over time?

The USB‑A plug and barrel jack are passive connectors with no moving parts; under normal indoor use the 100cm cable and moulded ends do not have a defined replacement interval.

What is the maximum continuous current the 5.5 x 2.1mm barrel connection can handle before voltage drop becomes an issue?

The cable delivers 5 V DC from the USB port; the practical current limit is set by the host port's output capability and the 100cm conductor gauge, not by the barrel connector itself.

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