3 Port 10Gbps USB C Hub with SD Card Reader - 3x USB-A & 1x SD Slot - Portable USB 3.1/3.2 Gen 2 Type C Adapter Hub - Laptop Hub - USB Bus Powered - Thunderbolt 3 Compatible

USB Type-C™ Hub | USB 3.1 Gen 2 |SD & microSD |25cm Cable | Bus-Powered | Mac & Windows®

Product ID: HB31C3ASDMB

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  • BUS-POWERED 3-Port USB-C HUB: USB 3.1 Gen 2/USB 3.2 Gen 2 Type-C hub with 3x USB-A ports and 1x UHS-II SD/microSD card reader (microSD adapter not incl); Supports data transfer up to SuperSpeed 10Gbps
  • UHS-II (ULTRA HIGH-SPEED-II) SD CARD READER: Data transfer up to 312Mbps utilizing SD 4.0; supports SD (Secure Digital), SDHC (SD High Capacity), SDXC (SD Extended Capacity) and MMC (Multimedia Card)
  • 3x USB-A 10Gbps PORTS: For high speed data transfers between storage devices, SSDs & other USB devices like AV adapters, thumb drives, keyboards & mice; Compatible with USB 3.1 Gen 1 / USB 3.0 / 2.0
Your price
¥8,277 JPY excl.
¥9,105 JPY incl.

Expand the connectivity of your USB-C laptop with this bus-powered 3-Port USB-C hub. It plugs into your laptop’s USB Type-C™ or Thunderbolt® 3 port, adding three USB-A ports and an SD card reader, so you can quickly connect more peripherals and devices. 

SD & microSD Card Reader 

The hub provides direct access to your SD memory cards or microSD cards as an additional medium for data storage and data transfer. Adapter required for microSD cards. 

Convenient Portability and Easy Setup   

This compact, lightweight USB-Type-C hub is a convenient and portable addition to your laptop accessories.  The USB-C cable is built-in, and hub is bus-powered, so it draws its power directly from your computer’s USB-C port, with no external power required. That means fewer cables to carry with you when you travel. The hub can draw up to 15 Watts of power from the connected host and operating multiple bus powered devices at one time with the total available power dependent on the connected host.  

The extended length attached cable of 9.8” (25 cm) provides more flexibility for longer reach connection requirements and plug and play installation.   

Connect Three USB-A Peripherals 

With support for USB-A peripherals, this hub is backwards compatible supporting both legacy and new USB devices. You can connect flash drives, video capture devices and external hard drives, with fast data transfer speeds of up to 10Gbps. This USB Type-C hub enhances your productivity, giving you the connections, you need while you work.  

HB31C3ASDMB is backed by a StarTech.com 2-year warranty and free lifetime technical support. 


  • Ideal for mobile workers, for use in the office and at home
  • Compact size works well in small or shared workspaces such as hot desks

Partner Numbers

  • SYNNEX Japan ZU20259
  • UPC 065030880480


  • OS Independent logo
OS Independent


Warranty Information Warranty 2 Years
Connector(s) 1 - Connector Type(s) USB 3.1 USB Type C (10 pin, Gen 2, 10 Gbps)
3 - Connector Type(s) USB 3.1 USB Type-A (9 pin, Gen 2, 10 Gbps)
1 - Connector Type(s) SD Slot
Environmental Operating Temperature 0 to 50℃
Storage Temperature -20 to 70℃
Humidity 0% to 95% (non-condensing) at 25℃
Hardware USB-C Device Port(s) No
USB-C Host Connection Yes
Fast-Charge Port(s) No
Ports 3
Interface USB 3.1 Gen 2
Bus Type USB 3.1 Gen 2
USB Pass-Through Yes
Industry Standards USB 3.1 Gen 2
Backward compatible with USB 3.0, 2.0 and 1.1
Chipset ID Realtek - RTS5420
Realtek - RTS5329
Indicators 1 - LED Indicators Link and Activity LED
Packaging Information Package Height 1.6 in [40.0 mm]
Package Length 5.7 in [14.6 cm]
Shipping (Package) Weight 6.4 oz [180.0 g]
Package Width 8.3 in [21.0 cm]
Performance Maximum Data Transfer Rate 10 Gbps
Type and Rate USB 3.2 Gen 2 - 10 Gbit/s
UASP Support Yes
Memory Media Type SD/MMC (Secure Digital/Multimedia Card)
SDHC (Secure Digital High Capacity)
SDXC (Secure Digital eXtended Capacity)
microSD (Micro Secure Digital) (adapter required)
microSDHC (Micro Secure Digital High Capacity) (adapter required)
microSDXC (Micro Secure Digital eXtended Capacity) (adapter required)
General Specifications SD Card Reader: Supports SD 4.0 and UHS-II (Ultra High Speed) for high speed file transfers, with bus speed up to 312 Mbps
Physical Characteristics Color Black & Space Gray
Form Factor Compact
Product Height 0.6 in [15.0 mm]
Product Length 1.8 in [45.0 mm]
Weight of Product 2.5 oz [70.0 g]
Product Width 14.2 in [36.0 cm]
Material Aluminum and Plastic
Cable Length 9.8 in [25 cm]
Power Power Source Bus Powered
Software OS Compatibility OS Independent
What's in the Box 1 - Included in Package USB-C Hub


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Compliance and safety

Compliance letters

Safety Measures

  • If product has an exposed circuit board, do not touch the product under power.
  • If Class 1 Laser Product. Laser radiation is present when the system is open.
  • Wiring terminations should not be made with the product and/or electric lines under power.
  • Product installation and/or mounting should be completed by a certified professional as per the local safety and building code guidelines.
  • Cables (including power and charging cables) should be placed and routed to avoid creating electric, tripping or safety hazards.
*Product appearance and specifications are subject to change without notice.

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