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A 4-foot USB-C cable with straight connectors on both ends

SMUGDESK

SMUGDESK USB4 Thunderbolt 4 Cable 40Gbps 240W 8K@60Hz 4 Feet

SKU CH-BG48-3AQ1C

A 40 Gbps USB cable carrying up to 240 W and 8K 60 Hz video over four feet

Cable Length 4 Feet

  • Transfers data at 40 Gbps for rapid file moves
  • Delivers up to 240 W power for fast laptop charging
  • Drives one 8K 60 Hz display or dual 4K 60 Hz monitors
  • Works with Thunderbolt 3 and 4 hosts plus USB 3.2 and 3.1 gear
  • Reads at 2.8 GB/s and writes at 2.1 GB/s in practice

What the cable does

This USB4 cable carries 40 Gbps data, up to 240 W power and 8K 60 Hz video over a four-foot USB-C to USB-C link. It works with Thunderbolt 3 and 4 hosts as well as USB 3.2, 3.1 and 2.0 devices.

What the 240 W rating changes

Paired with a compatible charger the cable delivers up to 48 V at 5 A, so one lead can power phones, accessories and gaming laptops alike. The E-Mark chip ensures the host negotiates the correct current automatically.

Where the 40 Gbps limit applies

Real-world throughput reaches 2.8 GB/s read and 2.1 GB/s write, and the 40 Gbps ceiling is shared between data and display traffic. Dual 4K 60 Hz monitors require two separate cables because the single link cannot drive both streams simultaneously.

Highlights

  • Transfers data at 40 Gbps for rapid file moves
  • Delivers up to 240 W power for fast laptop charging
  • Drives one 8K 60 Hz display or dual 4K 60 Hz monitors
  • Works with Thunderbolt 3 and 4 hosts plus USB 3.2 and 3.1 gear
  • Reads at 2.8 GB/s and writes at 2.1 GB/s in practice

Specifications

No published specifications for this item yet.

Other versions of this model

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Questions about this item

Will the 240W E-Mark chip need replacing over time?

The E-Mark chip is built into the cable ends and requires no separate maintenance or replacement.

What limits sustained 40Gbps transfers on this cable?

Real-world read speeds reach 2.8GB/s and write speeds 2.1GB/s; the host controller and storage device set the practical ceiling.

Does the cable get hot when delivering 240W continuously?

At up to 48V/5A the cable operates within specification; no additional cooling is required for normal all-day use.

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