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Small black adapter with 7.9 by 5.4 mm barrel plug and right-angle USB-C connector

Fervit

Fervit DC Jack 7.9x5.4mm to USB-C 90° 140W Adapter

SKU CH-8JD3-14P9X

Converts a 7.9×5.4 mm barrel jack to USB-C with 90° angled plug, delivering up to 140 W via PD and QC 2.0/3.0

  • Delivers up to 140W power via built-in PD trigger
  • Accepts 18-20V DC input from 135W or 140W chargers
  • 90-degree angled plug fits tight port clearances
  • Supports multiple output profiles including 20V at 7A
  • Compatible with 65W, 100W and 140W laptops, tablets and phones

DC Jack to USB-C Adapter

This adapter converts a 7.9x5.4mm DC barrel input into a USB-C output with a 90-degree angled plug. It is designed for users who need to power USB-C laptops, tablets or phones from an existing 135W or 140W DC charger. The built-in PD emulator trigger negotiates the required voltage automatically. It suits anyone replacing a lost proprietary tip or consolidating chargers.

Power Delivery Limits

The adapter accepts DC input between 18V and 20V at up to 140W and outputs a maximum of 140W. Supported fixed output profiles are 5V/2A, 9V/3A, 15V/2A, 20V/3.25A, 20V/5A and 20V/7A. It implements USB PD alongside QC 2.0 and QC 3.0 handshakes. No power conversion occurs above the stated 140W ceiling, so higher-wattage sources will not yield more output.

Capacity and Headroom

The unit comfortably handles 140W, 100W and 65W USB-C devices such as MacBooks, laptops, tablets and phones when paired with a matching 135W or 140W DC source. It runs out of headroom if the attached device requests more than 140W or a voltage outside the 18–20V input window. Users must verify their device’s rated voltage and current before connecting to avoid damage.

How it compares

Measured against everything we stock in USB Cords & Extension Cables, at today’s prices. Recalculated every night.

Price $18.99
Pricier than about 73% of the 15,227 comparable items (median $14.99).

Specifications

Product
Brand nameFervit

Questions about this item

Should I pick the 7.9x5.4mm DC jack version or another size for my laptop?

This adapter only exists with a 7.9x5.4mm DC input; match that exact barrel size on your existing 18-20V charger before buying.

What does the 140W rating actually deliver to my MacBook or laptop?

It passes up to 140W through USB-C at 20V 7A, 20V 5A, 20V 3.25A, 15V 2A, 9V 3A or 5V 2A, so a 140W or 100W machine charges at full speed while a 65W device draws only what it needs.

Which USB-C Power Delivery standards does the built-in trigger chip support?

The internal PD emulator handles USB PD and QC 2.0/3.0, negotiating 5V, 9V, 15V or 20V output steps up to the 140W ceiling.

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