Thunderbolt 3 to USB 3.1 Controller Adapter - 1x
USB-C, 3x USB-A
Product ID: TB33A1C
This Thunderbolt™ 3 to USB 3.1 controller adapter offers twice the performance of a traditional 4-port
USB 3.1 hub, enabling you to connect a wide range of devices to your Thunderbolt 3 laptop. With
dedicated USB buses, the controller adds four USB ports - two USB-A (5Gbps), one USB-C (10Gbps) and
one USB-A (10Gbps).
High-performance 10Gbps ports
The two 10Gbps ports are useful for accessing high-performance, bandwidth-hogging devices such as
storage arrays, 3D scanners, audio-video capture and broadcast devices, and external SSD drives. The
Thunderbolt 3 port can also be used for connecting a second 10Gbps USB-C device.
When only one port is being accessed, the full dedicated 10Gbps is available. If both 10Gbps ports are
being accessed at the same time, the bandwidth being provided to each device will be 5Gbps.
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1 800 265 1844
Dedicated 5Gbps ports
The two 5Gbps ports can provide 5Gbps of bandwidth to each device simultaneously, making it ideal for
devices such as portable hard drives. You can also connect low-bandwidth devices such as USB flash
drives.
The front USB-A port supports both data and charging. The adapter does not need to be connected to a
Thunderbolt 3 computer in order to charge your mobile devices.
Extend your workstation
The adapter features a second Thunderbolt 3 port that you can use to connect an additional display to
your laptop (a USB-C video adapter may be required). The port can also be used to connect additional
Thunderbolt devices, daisy-chaining up to six devices in all.
The TB33A1C is backed by a StarTech.com 2-year warranty and free lifetime technical support.
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1 800 265 1844
Certifications, Reports
and Compatibility
Applications
• Connect high-bandwidth devices such as such as storage arrays, 3D
scanners, audio-video capture and broadcast devices and external
SSD drives to the 10Gbps ports
• Add two 10Gbps ports (one USB-A and one USB-C) and two 5Gbps
USB-A ports, without losing the Thunderbolt 3 port on your laptop
• Connect multiple bus powered SSDs with dedicated bandwidth for
faster read write access
• Connect low-bandwidth and legacy USB devices such as a keyboard,
mouse or USB flash drive to the 5Gbps ports
• Connect a Thunderbolt 3 laptop to your existing USB 3.0 devices,
such as USB 3.0 docking station, printer, hubs
Features
• Provides twice the performance of a traditional 4-port USB 3.1 hub
• Add multiple devices to your Thunderbolt 3 laptop with a total shared
bandwidth of 20Gbps
• USB-A charge port charges your devices with no host connection
required
• Supports USB Battery Charging Specification 1.2
• Included power adapter ensures your connected devices are fully
powered and operational
• Thunderbolt 3 cable included
• Daisy chain up to six Thunderbolt 3 devices
• Sleek, durable aluminum housing
• Backward compatible with older USB 2.0 and 1.1 devices
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Warranty 2 Years
Hardware Bus Type Thunderbolt 3
USB 3.1 Gen 2
USB 3.1 Gen 1
Chipset ID Intel - Alpine Ridge JHL6540
ASMedia - ASM1042A
ASMedia - ASM1142
Fast-Charge Port(s) No
Industry Standards Thunderbolt 3
USB Battery Charging Specification Rev. 1.2
Universal Serial Bus 3.1 Specifications Revision 1.0
Universal Serial Bus Specification Revision 2.0
Extensible Host Controller Interface Specification revision
1.1
USB Attached SCSI Protocol Revision 1.0
Ports 4
USB-C Device Port(s) Yes
USB-C Host Connection No
Performance Maximum Data Transfer Rate Aggregate Bandwidth 20Gbit/s
Type and Rate USB 3.1 Gen 2 - 10 Gbit/s
USB 3.1 Gen 1 - 5 Gbit/s
UASP Support Yes
Connector(s) Connector Type(s) 2 - Thunderbolt™ 3 USB-C (24-pin) Male
2 - USB Type-A (9 pin) USB 3.0 Female
1 - USB 3.1 USB Type-A (9 pin, Gen 2, 10 Gbps) Female
1 - USB Type-C (24 pin) USB 3.1 (10Gbps)
Software OS Compatibility Windows® 7, 8, 8.1, 10
macOS 10.12 - 10.3
Special Notes /
Requirements
Note When connecting a display to the Thunderbolt 3 USB-C port,
a USB-C video adapter might be required depending on the
input of your display.
Secondary Thunderbolt 3 port can also be used to connect
USB 3.1 (10Gbps) USB-Type C devices, such as USB 3.1
Storage Enclosure or Hubs. Backwards compatible with USB
3.1 Gen 1 (USB 3.0), and USB 2.0.
USB 3.1 Gen 1 is also known as USB 3.0; this connectivity
standard offers speeds up to 5Gbps. USB 3.1 Gen 2 offers
speeds up to 10Gbps.
www.startech.com
1 800 265 1844
System and Cable Requirements Thunderbolt 3 equipped computer with a Thunderbolt 3 port.
Your laptop's Thunderbolt 3 port must support USB Power
Delivery 2.0 in order to power and charge your laptop.
Power Center Tip Polarity Positive
Input Current 1.8 A
Input Voltage 110V-240V AC
Output Current 3.25 A
Output Voltage 20V DC
Plug Type N
Power Consumption (In Watts) 65W
Power Delivery 15W
Power Source AC Adapter Included
Environmental Humidity 90% RH
Operating Temperature 0°C to 40°C (32°F to 104°F)
Storage Temperature -20°C to 70°C (-4°F to 158°F)
Physical
Characteristics
Cable Length 20.4 in [518 mm]
Color Silver & Black
Enclosure Type Aluminum
Form Factor Desktop
Product Height 0.9 in [23.5 mm]
Product Length 5.8 in [148 mm]
Product Weight 7.1 oz [200 g]
Product Width 2.9 in [74 mm]
Packaging
Information
Shipping (Package) Weight 3.4 lb [1.6 kg]
What's in the Box Included in Package 1 - Thunderbolt 3 controller
1 - Thunderbolt 3 cable
1 - universal power adapter (NA/JP, UK, EU, ANZ)
1 - quick-start guide
Product appearance and specifications are subject to change without notice.
www.startech.com
1 800 265 1844
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