We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Black USB-C male-to-male extension cable .5m 24-pin Thunderbolt 40Gbps 240W

Cable Matters USB-C Extension Cable 0.5m 40Gbps 240W Thunderbolt 4

SKU CH-K511-ECM2W

A 0.5 m male-to-female USB-C extender adds 1.6 ft of reach while carrying 40 Gbps data, 8K 60 Hz video and 240 W power delivery

  • Rated speed40 Gbit/s
  • Connection typeUSB Type C
  • Cable length0.5
  • Connector count24
  • Connector detailsUSB Type C
  • Connector genderMale-to-Male
  • Extend reach by 0.5 m without signal loss
  • 40 Gbps data rate matches Thunderbolt 4 speed
  • 240 W power delivery charges laptops fast
  • 24-pin reversible plugs insert either way
  • Supports 8K at 60 Hz video output

USB-C Thunderbolt 4 extender

This 0.5 m USB-C male-to-male cable extends an existing Thunderbolt 4 or USB4 connection without reducing its 40 Gbps bandwidth. It is built for users who need a short reach increase between a host and a dock, monitor or peripheral. The 24-pin reversible connectors plug in either orientation for quick insertion. It suits creators and professionals who rely on full-speed data and video links.

Passive copper link with 240 W delivery

The copper construction carries up to 240 W of Power Delivery so laptops and power-hungry devices charge at full rate while data and video flow. Because the cable is passive, it adds no active circuitry that could generate heat or fan noise. In normal use the link remains thermally neutral and silent, drawing only the power negotiated by the connected devices. The 1.6 ft length keeps voltage drop minimal for reliable 240 W operation.

Fits tight setups and frees port strain

The short half-metre tail lets you bridge a gap behind a desk or inside a rack without coiling metres of excess cable. It connects directly to a standard USB-C or Thunderbolt 4 cable, turning a 3.3 ft run into a longer reach for a dock or an 8K 60 Hz display. The male-to-male design removes stress on the host port by absorbing plug and unplug cycles at the extension joint. Builders who need longer runs or active signal boosting should look beyond this passive extender.

How it compares

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

Price $19.99
Pricier than about 77% of the 15,227 comparable items (median $14.99).

Specifications

Product
Brand nameCable Matters
Product typeUSB-C Cable
Product colorBlack
Performance
Rated speed40 Gbit/s
Ports & slots
Connection typeUSB Type C
Connector count24
Connector detailsUSB Type C
Connector genderMale-to-Male
Size & build
Cable length0.5
Build detailsCopper

Questions about this item

How do I install the 0.5m extension without losing 40Gbps speed?

Plug the male end into your existing USB-C or Thunderbolt cable and the female end into the device; keep the total combined length under 3.3ft for docking stations or 6ft for monitors to avoid signal issues.

Will the 24-pin reversible connectors wear out from daily plugging?

The cable uses a durable copper construction rated for frequent connecting and disconnecting; no user maintenance is required, but replace the cable if the latch feels loose or video drops out.

At what length does 8K 60Hz video become unstable?

Extending beyond a 6ft total run to a monitor can exceed device tolerance and cause signal issues; for docking stations the safe limit is a 3.3ft total run.

More in USB Cords & Extension Cables

Similar items