This article covers StarTech.com Thunderbolt 3接続4ポートUSB 3.1ハブ TB33A1C.

The StarTech.com TB33A1C is a Thunderbolt 3-powered USB 3.1 hub that adds four high-performance USB ports to compatible laptops and desktops.

With two 10Gbps SuperSpeed+ ports (one USB-A and one USB-C) and two 5Gbps USB 3.0 ports, it delivers dedicated bandwidth through multiple USB controllers—ideal for external SSDs, VR headsets, and 3D scanners.

Its compact footprint (147×74×23mm) fits neatly on a desk, and the included 65W universal power adapter ensures reliable operation even with power-hungry peripherals. The downstream Thunderbolt 3 port supports DisplayPort Alt Mode for external displays up to 5K@30Hz or 4K@60Hz, plus daisy-chaining of up to five Thunderbolt 3 devices.

The hub connects to a host via a 0.5m Thunderbolt 3 cable.

Port configuration includes two USB-A 5Gbps (USB 3.1 Gen 1), one USB-A 10Gbps (Gen 2), one USB-C 10Gbps (Gen 2), and one downstream Thunderbolt 3 port.

The downstream TB3 port offers three modes: external display output, daisy-chain connection of up to five TB3 devices, or standard USB-C device support. Compatible with Windows 7 and later, macOS 10.12 and later, and Linux—drivers install automatically.

MacBook Pro/Air (2016-2020) and other Thunderbolt 3 laptops work seamlessly. The hub also supports BC 1.2 fast charging (up to 7.5W) on the front USB-A port.

Launched in 2018, the TB33A1C sits in the mid-range USB hub market, offering higher performance than typical USB-C hubs due to its dedicated per-port controllers and Thunderbolt 3 bandwidth. The bundle includes the hub, 0.5m Thunderbolt 3 cable, 65W universal power supply with international plugs, and a quick-start guide.

The two-year warranty covers manufacturing defects. Available through and major electronics retailers.

Ideal for creative professionals who need to connect fast external storage, capture cards, or VR gear to a Thunderbolt 3 laptop. Also suited for MacBook users transitioning from USB-A to USB-C, as it provides legacy USB-A ports alongside modern 10Gbps ports.

The downstream TB3 port makes it a great companion for users who want to add a single 4K display or daisy-chain multiple TB3 peripherals.

Product Disclosure (Amazon)

  • Manufacturer: StarTech.com(スターテック)
  • Seller: Startech Japan KK
  • Fulfilled by: Amazon
  • ASIN: B078F5FMD9
  • Note: This article covers a manufacturer-made product based on Amazon listing details.