This article covers StarTech.com 4ポートUSB-Cハブ.

Overview

The StarTech.com HB31C2A2CB is a compact USB-C hub designed for modern laptops that need more ports. It offers four ports in total: two USB-A and two USB-C, all running at SuperSpeed 10Gbps (USB 3.1/3.2 Gen 2). The hub is bus-powered, meaning it draws power directly from your host device—no extra power adapter required. Its aluminum enclosure provides excellent heat dissipation and a premium feel, while the built-in 25cm cable keeps desk clutter to a minimum. Plug-and-play compatibility across Windows, macOS, and Linux means you can start using it immediately without installing any drivers. The hub also supports Power Delivery pass-through (up to 15W shared among downstream ports), so you can keep charging your laptop while connecting peripherals.

Connectivity & Compatibility

Host interface: USB Type-C (attached 25cm cable) Supported OS: Windows, macOS, Linux – no driver needed Backward compatibility: works with USB 3.0/2.0/1.1 devices Power: bus-powered from the host; recommended host USB-C port delivers at least 5V/900mA Power Delivery: supports PD pass-through (max 15W shared across all downstream ports) Compatible with: laptops, tablets, desktops with a USB-C port

Product Info

StarTech.com has been a trusted name in IT peripherals since 1985, and the HB31C2A2CB sits comfortably in the entry-to-midrange segment for mobile users. It comes with a 2-year manufacturer warranty and free lifetime technical support. The hub is widely available on for around ¥8,605. In the box you get the hub itself; no additional cables or adapters are included. With its all-aluminum build and 10Gbps speed, this hub is a solid choice for users who want a reliable, portable port expansion without breaking the bank.

Best Use Cases

For laptop users running out of ports: If your laptop has only one or two USB-C/Thunderbolt ports, this hub instantly adds two USB-A and an extra USB-C, letting you connect a mouse, keyboard, thumb drive, and an external SSD simultaneously. The 10Gbps speed ensures fast file transfers. Frequent travelers and remote workers: Its small footprint (approx. 80×50×12 mm) and bus-powered design make it a perfect travel companion. No wall wart needed, and the short cable keeps your bag tidy. MacBook Air/Pro users: MacBooks that rely solely on USB-C benefit greatly from this hub, as it restores native USB-A connectivity for older peripherals like printers, scanners, and flash drives. It's also a great match for Chromebooks and Windows ultrabooks. When to look elsewhere: If you regularly need to charge your laptop at full speed while transferring data to multiple high-power devices (e.g., large external SSDs), a self-powered hub with higher PD wattage might serve you better. Also consider competitors like Anker PowerExpand (more ports but slightly higher price) or Belkin (often includes video output).

Things to Consider

Bus-powered hubs have inherent power limits. The HB31C2A2CB shares 15W among all downstream ports, so connecting two bus-powered external SSDs simultaneously may cause instability. If your workflow demands heavy multi-device usage, investing in a self-powered hub with an external power supply is recommended. Also, note that while the hub supports PD pass-through, it doesn't include a PD charger—you need to supply your own USB-C charger (and the hub will pass power through to the laptop). The actual PD speed depends on the charger's capability. Compared to cheaper 5Gbps hubs, this model's 10Gbps makes a real difference with fast storage devices. For everyday peripherals (mouse, keyboard), the speed difference is negligible, but for copying large media files, it's well worth the premium.

Product Disclosure (Amazon)

  • Manufacturer: StarTech.com(スターテック)
  • Seller: Startech Japan KK
  • Fulfilled by: Amazon
  • ASIN: B08411WQGG
  • Note: This article covers a manufacturer-made product based on Amazon listing details.