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A black USB-C to USB-C cable coiled on a white surface

SMUGDESK

SMUGDESK USB4 40Gbps 240W 8K usb cable

SKU CH-QDN2-8QT3N MPN USB4

A 40 Gbps USB4 cable delivers 240 W charging, 8K 60 Hz video and fast data transfer for Type‑C devices

Cable Length 5 Feet

Model USB4

  • Charges phones to gaming laptops at up to 240W
  • Drives single 8K@60Hz or dual 4K@60Hz displays
  • Moves 14 hours of HD video or 25,000 photos in one minute at 40Gbps
  • Works with Thunderbolt 4, 3, USB 3.2, 3.1, 3.0, 2.0
  • Built-in safety resistor keeps current stable at 5A

Ready for 240W charging and 8K video

This USB4 cable delivers up to 240W power at 48V/5A and supports single 8K@60Hz or dual 4K@60Hz output. It handles 40Gbps data transfer and is backward compatible with Thunderbolt 4 and earlier USB standards. A built-in safety resistor keeps current stable at 5A. The 5ft length suits desks and portable setups.

Built-in safety resistor and PD 3.1 support

The cable includes a safety resistor that limits current to 5A, protecting connected gear from spikes. It implements the PD 3.1 extended power range, enabling direct high-voltage charging for power tools, e-bikes and industrial supplies. Backward compatibility with PD 3.0 means it works with existing chargers while future-proofing for higher-wattage devices.

Check port capability before ordering

Full 40Gbps throughput and 240W charging require host and device ports that support USB4 Gen3 and PD 3.1 respectively. Older ports will fall back to 20Gbps or lower speeds and reduced power. Verify your laptop, dock, monitor or SSD enclosure lists USB4 40Gbps and 240W PD to get the advertised performance.

Highlights

  • Charges phones to gaming laptops at up to 240W
  • Drives single 8K@60Hz or dual 4K@60Hz displays
  • Moves 14 hours of HD video or 25,000 photos in one minute at 40Gbps
  • Works with Thunderbolt 4, 3, USB 3.2, 3.1, 3.0, 2.0
  • Built-in safety resistor keeps current stable at 5A

Specifications

No published specifications for this item yet.

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Questions about this item

Will the USB4 cable's 5A current rating require any maintenance or replacement over time?

The built-in safety resistor keeps current stably controlled within 5A to avoid disturbance and damage; no user maintenance or scheduled replacement is required for the cable itself.

What limit appears first during sustained 40Gbps data transfers with this cable?

Sustained 40Gbps throughput requires both host and device to support USB 4.0 Gen3; if either end only supports Gen2 the link caps at 20Gbps.

How much heat or power loss should I expect when running 240W charging all day through this cable?

The cable supports PD 3.1 up to 48V/5A (240W) with a built-in safety resistor that stabilises current at 5A; no additional heat or power-loss figures are specified.

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