The Lenovo ThinkPad Universal Thunderbolt 4 Dock is a business-grade Thunderbolt 4 dock delivering 100W of charging and supporting up to four simultaneous displays — an unusually high display count for a single-cable dock. It achieves this via two DisplayPort 1.4 outputs, one HDMI port, and one downstream Thunderbolt 4 port that can drive a fourth display via daisy chain. The four downstream USB-A 3.2 Gen 2 (10 Gbps) ports are faster than the Gen 1 ports found on many competing docks. Lenovo's own datasheet gives the HDMI port as HDMI 2.1.
Device Information
- Manufacturer
- Lenovo
- Release Year
- 2021
- Model Number
- 40B00135US
- Category
- Dock / Hub
Source: manufacturer product page · Last updated: · How we verify port data →
Available Ports
| Connector | Quantity | Power (PD) | Capabilities | Label | Notes |
|---|---|---|---|---|---|
| Thunderbolt 4 (USB-C) | 1 | 100 W | DP Alt Mode Thunderbolt | Upstream (to laptop, rear) | 40 Gbps, 100W PD to laptop |
| Thunderbolt 4 (USB-C) | 1 | 15 W | DP Alt Mode Thunderbolt | Thunderbolt 4 downstream (rear) | 40 Gbps, 15W; daisy chain or Thunderbolt peripheral / 4th display path |
| DisplayPort 1.4 | 2 | — | — | DisplayPort 1.4 (rear) | Supports 4K@120Hz or 8K@30Hz |
| HDMI 2.1 (Type A – Standard) | 1 | — | — | HDMI (rear) | HDMI 2.1 per Lenovo's datasheet |
| USB Type-A (USB 3.2 Gen 2) | 4 | — | — | USB-A 3.2 Gen 2 (rear) | 10 Gbps each |
| USB Type-C (USB 3.2 Gen 2) | 1 | — | — | USB-C downstream (rear) | 10 Gbps, data only |
| RJ-45 (Gigabit Ethernet) | 1 | — | — | Gigabit Ethernet (rear) | 1 Gbps wired networking |
| 3.5mm TRRS (Headset with Mic) | 1 | — | — | Audio Combo Jack | Combined headphone/microphone jack |
| Kensington Security Slot | 1 | — | — | Security Lock Slot | Kensington-compatible security slot |
Notes & Compatibility
Lenovo’s own ThinkPad Universal Thunderbolt 4 Dock datasheet prints “1 x HDMI 2.1” alongside “2 x DisplayPort 1.4”, “1 x RJ45 Gigabit Ethernet” and “1 x 3.5 mm Combo Audio Jack”, so HDMI 2.1 is Lenovo’s own figure and not a retailer’s guess. Supports up to 4 simultaneous displays via TB4 daisy chain. One of the four USB-A ports is always-on — that is the one to leave a phone on overnight. The dock ships with a 135W Slim Tip adapter of its own and returns up to 100W to the notebook.