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

Overview

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.

Connectivity & Compatibility

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.

Product Info

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.

Best Use Cases

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.