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A coiled cable with a 5.5×2.1mm barrel plug on one end, a USB-C connector on the other, and a small LED display module in between

SMUGDESK

SMUGDESK 5.5×2.1mm DC Jack to USB-C 140W Smart LED Display Cable

SKU CH-3AN6-D0EGK

Converts a 5.5×2.1mm DC jack to USB-C PD output up to 140W with a real-time LED power display

  • Converts 5.5×2.1mm DC jack to USB-C for versatile charging
  • Delivers up to 140W with 20V PD for high-power devices
  • Smart LED display shows real-time voltage and current data
  • Built-in safeguards protect against overvoltage, overcurrent and short circuits
  • Compatible with laptops, phones, tablets and other USB-C gear

DC Jack to USB-C 140W Power Cable

This cable converts a 5.5×2.1mm barrel jack input into a USB-C Power Delivery output rated at 140W with a 7A maximum current. It automatically negotiates 5V, 9V or 20V to suit the connected device and includes an LED readout that shows live voltage and current. Over-voltage, over-current and short-circuit protection are built in for stable charging.

Users who need live power monitoring

The integrated LED display makes this cable useful for technicians or owners who want to verify the negotiated voltage and current at a glance. It suits laptops, phones, tablets and other high-power USB-C gear that accept PD charging from a DC source. Buyers who require data transfer, video output or any signal path beyond power delivery cannot use this cable because it carries power only.

140W maximum output with autoswitching PD voltages

The single decisive specification is the 140W (7A) ceiling combined with automatic 5V, 9V and 20V selection. If the target device draws more than 140W or needs a fixed voltage outside that set, this cable will not meet the requirement.

Highlights

  • Converts 5.5×2.1mm DC jack to USB-C for versatile charging
  • Delivers up to 140W with 20V PD for high-power devices
  • Smart LED display shows real-time voltage and current data
  • Built-in safeguards protect against overvoltage, overcurrent and short circuits
  • Compatible with laptops, phones, tablets and other USB-C gear

Specifications

No published specifications for this item yet.

Questions about this item

How do I connect the 5.5×2.1mm barrel jack to my power adapter without reversing polarity?

Align the centre pin of the 5.5×2.1mm jack with the adapter tip, push firmly until seated, then plug the USB-C end into the device; the LED will show 20 V if the connection is correct.

Will the smart LED display or the internal protection circuit need replacement after extended use?

The LED display and the built-in overvoltage, overcurrent and short-circuit safeguards are solid-state with no user-serviceable parts; no scheduled maintenance or component replacement is required.

At what point does the cable hit its thermal or current limit during continuous 140 W charging?

The cable is rated for a maximum of 7 A at 20 V, so sustained loads above 140 W will trigger the overcurrent protection and shut down output until the load drops back within spec.

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