QNAP Thunderbolt 4 Passive 40GB/S 0.5M USB Type-c - CAB-TBT4-0M5

QNAP CAB-TBT4-0M5 Thunderbolt 4 Passive Cable

Overview

The CAB-TBT4-0M5 is a 0.5-meter Thunderbolt 4 passive cable delivering 40Gbps bandwidth over a USB Type-C connector. At half a meter, this is a direct-attach cable — the right choice when you are docking a QNAP NAS or expansion unit within immediate reach of a host workstation or connecting two QNAP units side-by-side in a short-distance expansion scenario. Passive construction means no active chipset in the cable, which keeps latency at its lowest and eliminates one more potential failure point in the link. For QNAP storage and network appliances, this cable supports high-throughput Thunderbolt 4 connections where full 40Gbps throughput matters — direct-attach NAS access, daisy-chained expansion enclosures, or NAS and storage systems tightly coupled to a Thunderbolt-equipped workstation.

Compatibility

Designed for use with QNAP devices that carry Thunderbolt 4 ports, including QNAP NASbook and Thunderbolt-series NAS models (such as the TVS-h series and compatible expansion units). Both ends must support Thunderbolt 4 or Thunderbolt 3 — the USB-C connector is physically compatible with USB 3.2 and USB4 ports, but Thunderbolt 4 speeds require Thunderbolt 4 or Thunderbolt 3 certified ports on both host and device. Confirm your specific QNAP model's Thunderbolt generation before ordering. Not intended for long-run cabling — the 0.5m passive design is optimized for rack-adjacent or desktop direct-attach installs only; longer runs require an active Thunderbolt cable.

Installation Notes

No tools required. Seat the USB-C connectors fully on both ends before powering devices. Keep the cable radius gentle — sharp bends on passive Thunderbolt cables can degrade signal integrity at 40Gbps. Do not extend this cable with a coupler or hub; Thunderbolt 4 at full speed requires a point-to-point connection without passive extension.