Plugable TBT3-UDZ Review 2026 - Specs, Pros & Cons

Name: Plugable Thunderbolt 3 and USB-C Dual Display Docking Station
Brand: Plugable
SKU: TBT3-UDZ

The Plugable TBT3-UDZ is a 14-in-1 Thunderbolt 3 and USB-C docking station built for users who want flexible monitor connections without adapters. Instead of forcing you into either HDMI or DisplayPort, it gives you two HDMI 2.0 ports and two DisplayPort outputs, while still supporting only two external displays at a time. On Thunderbolt 3, Thunderbolt 4, or USB4 hosts, it can drive up to two 4K@60Hz displays. On compatible USB-C hosts, it falls back to lower-bandwidth DisplayPort Alt Mode with support for up to two 1080p@60Hz displays or one 4K@30Hz display. The rest of the port selection is generous: one USB-C 10Gbps port, one USB-A 10Gbps port, five USB-A 5Gbps ports, Gigabit Ethernet, SD and microSD card readers, and a 3.5mm combo audio jack. Plugable also includes a 0.8m certified 40Gbps Thunderbolt 3 cable and a vertical stand. The headline charging spec is 100W maximum USB Power Delivery, with Thunderbolt certification limiting delivered laptop charging to 96W. That is enough for many 15-inch and 16-inch laptops, including Intel MacBook Pro models that shipped with 96W chargers.

Best Legacy Thunderbolt 3 Pick

Pros & Cons

What We Like

Dual 4K@60Hz display support over Thunderbolt 3, Thunderbolt 4, or USB4
Choice of HDMI or DisplayPort for either monitor removes adapter hassles
96W certified laptop charging handles many larger laptops
Seven USB data ports plus SD, microSD, Ethernet, and audio
Included 0.8m certified Thunderbolt 3 cable and vertical stand
No DisplayLink driver required for displays

What Could Be Better

Legacy product replaced by the newer Plugable TBT4-UDZ
Workaround: Buy only if discounted or if the exact TBT3-UDZ port layout fits your desk better than the newer model.
USB-C-only systems lose the main dual 4K advantage
Workaround: Use a Thunderbolt 3, Thunderbolt 4, or USB4 laptop for dual 4K@60Hz. USB-C-only laptops are limited to dual 1080p or single 4K@30Hz.
Heavy desk-focused design is not portable
Workaround: Treat it as a permanent desktop dock. Use the included vertical stand to reduce desk footprint.
Base M1 and M2 Macs support only one external display
Workaround: Use an M1 Pro/Max or later Pro/Max Mac for dual native displays, or choose a DisplayLink dock if you need multiple displays on base Apple Silicon.
No downstream Thunderbolt port for daisy-chaining
Workaround: Connect Thunderbolt storage or eGPU devices directly to another Thunderbolt port on the laptop.

Display Support

Max Displays: 2

2 displays (Dual 4K@60Hz on compatible Thunderbolt 3, Thunderbolt 4, or USB4 hosts using any two HDMI 2.0 or DisplayPort outputs. Plugable also lists 4096x2160@60Hz support, but this site normalizes 4K UHD as 3840x2160.)

3840x2160 @ 60Hz

1 display (Single 4K@60Hz on Thunderbolt 3, Thunderbolt 4, or USB4 hosts.)

3840x2160 @ 60Hz

2 displays (Dual 1080p@60Hz on compatible non-Thunderbolt USB-C hosts.)

1920x1080 @ 60Hz

1 display (Single 4K@30Hz on compatible non-Thunderbolt USB-C hosts.)

3840x2160 @ 30Hz

Ports & Connectivity

USB Ports

1x USB-C 3.1

1x USB-A 3.1 7.5W

5x USB-A 3.0

Video Outputs

2x HDMI 2.0

2x DisplayPort 1.2

Network

1x Ethernet (1 Gbps)

Audio

1x 3.5mm combo

Card Readers

1x SD

1x microSD

Full Specifications

General
Manufacturer	Plugable
Model	TBT3-UDZ
Release Date	2020-09
MSRP	$239.95
Connectivity
Host Connection	Thunderbolt 3
Max Data Rate	40 Gbps
Driver Required	No (native)
Display Output
Max Displays	2
2x Display	3840x2160 @ 60Hz (Dual 4K@60Hz on compatible Thunderbolt 3, Thunderbolt 4, or USB4 hosts using any two HDMI 2.0 or DisplayPort outputs. Plugable also lists 4096x2160@60Hz support, but this site normalizes 4K UHD as 3840x2160.)
1x Display	3840x2160 @ 60Hz (Single 4K@60Hz on Thunderbolt 3, Thunderbolt 4, or USB4 hosts.)
2x Display	1920x1080 @ 60Hz (Dual 1080p@60Hz on compatible non-Thunderbolt USB-C hosts.)
1x Display	3840x2160 @ 30Hz (Single 4K@30Hz on compatible non-Thunderbolt USB-C hosts.)
Ports (11+ total)
USB-C 3.1	1x
USB-A 3.1	1x (7.5W)
USB-A 3.0	5x
HDMI 2.0	2x
DisplayPort 1.2	2x
Ethernet (RJ45)	1x 1 Gbps
Audio (3.5mm-combo)	1x
SD Card Reader	1x
microSD Card Reader	1x
Power
Power Input	DC-barrel
Laptop Charging	Up to 96W

Compatibility

Windows (10+)

Full dual 4K@60Hz support on compatible Thunderbolt 3, Thunderbolt 4, and USB4 systems. USB-C-only systems are limited by DisplayPort Alt Mode bandwidth.

macOS (10.13+)

Works with Intel Thunderbolt 3 Macs and Apple Silicon Pro/Max systems within Apple's external display limits. Base M1 and M2 Macs support one external display only.

ChromeOS

May work on compatible USB-C or Thunderbolt Chromebooks, but display support depends on host DisplayPort Alt Mode capability.

Known Issues

Base M1 and M2 MacBook Air/Pro

Limited to one external display

USB-C-only laptops without Thunderbolt or USB4

Reduced display capability

Older macOS Big Sur 11.1 to 11.6 systems

Known display and Ethernet sleep regressions

7.8 /10

Our Verdict

Very Good

The Plugable TBT3-UDZ is still one of the more practical Thunderbolt 3 docks if you care about display flexibility. PCWorld called it one of the best and most flexible Thunderbolt 3 docks it had tested, and that praise makes sense: two HDMI ports, two DisplayPort outputs, 96W certified charging, seven USB data ports, card readers, Ethernet, and an included stand cover most desk setups cleanly. The trade-off is that you are paying for ports you may not use, and the dock is now a legacy model that Plugable positions below the newer TBT4-UDZ. It also weighs about 4.1 lb with its power hardware according to PCWorld, so this is a desk fixture rather than a travel dock. Compatibility is good but not magic. Thunderbolt and USB4 laptops get the best display support, while USB-C-only systems are limited to 1080p dual displays or one 4K@30Hz. Base M1 and M2 Macs are limited to one external display by Apple hardware limits, and older macOS Big Sur releases had known dual-display and Ethernet sleep issues. If you find it at a strong discount and need either HDMI or DisplayPort flexibility, the TBT3-UDZ remains a smart buy. If you are buying new at close to the same price as Plugable's Thunderbolt 4 replacement, the TBT4-UDZ is the safer long-term choice.

Frequently Asked Questions

Does the Plugable TBT3-UDZ support dual 4K monitors?

Yes. On compatible Thunderbolt 3, Thunderbolt 4, or USB4 laptops, the Plugable TBT3-UDZ supports up to two 4K@60Hz external displays. You can use any two of its HDMI 2.0 or DisplayPort outputs.

Can the Plugable TBT3-UDZ run four monitors?

No. The dock has two HDMI ports and two DisplayPort outputs, but it supports a maximum of two external displays at one time. The four physical video ports are there so you can choose HDMI or DisplayPort without adapters.

Does the Plugable TBT3-UDZ work with USB-C laptops?

Yes, but with reduced display performance. Plugable lists support for up to two 1080p@60Hz displays or one 4K@30Hz display on compatible USB-C laptops. For dual 4K@60Hz, use Thunderbolt 3, Thunderbolt 4, or USB4.

How much power does the Plugable TBT3-UDZ provide?

The dock advertises up to 100W USB Power Delivery, with Thunderbolt certification limiting delivered host charging to 96W. That is enough for many 15-inch and 16-inch laptops, including Intel MacBook Pro models that shipped with 96W chargers.

Is the Plugable TBT3-UDZ still worth buying?

It can be worth buying if discounted and if you want a Thunderbolt 3 dock with both HDMI and DisplayPort built in. Plugable now promotes the newer TBT4-UDZ as the replacement, so buyers paying near-new prices should compare that model first.

Head-to-Head Comparisons

Plugable TBT3-UDZ vs TBT4-UDZ: Which Plugable Thunderbolt Dock Should You Buy?
A detailed comparison of the Plugable TBT3-UDZ and Plugable TBT4-UDZ docking stations, covering display support, ports, power delivery, compatibility, and value.