Lenovo ThinkPad Ultra Dock 90W — Docking Station

The Lenovo ThinkPad USA Ultra Dock 90W is a compact docking station that expands one compatible ThinkPad into a full desktop workspace with power, six USB ports, multiple video outputs and Ethernet.

This retail-packaged Ultra Dock (40A20090US) is designed for a range of ThinkPad notebooks and provides a single connector to deliver charging, wired networking and multiple peripheral connections. It supports two external displays (in addition to or instead of your laptop screen depending on GPU) and includes a 90W US two-prong AC adapter to keep compatible laptops charged while connected.

Which ThinkPad models work with this 90W Ultra Dock?

This dock is compatible with many Lenovo ThinkPad models that accept the proprietary Ultra Dock interface and are supported by a 65W or 90W power envelope. It is not compatible with select quad-core or discrete-graphics models that require the 170W Ultra Dock.

• Compatible series: L440/L540, X240/X250/X260/X270, T440/T440s/T440p/T470/T470s/T470p/T540p, T550/T560, A475, L450–L570 family.
• Also supports selected P51s and ThinkPad 25 units listed by Lenovo.
• Not for T460p quad-core or other models requiring 170W power—use Ultra Dock 170W instead.

How many monitors and what video connections can I use?

The Ultra Dock provides multiple video outputs to flexibly connect external screens. Up to two external monitors can be driven simultaneously (including combinations with the laptop display depending on the laptop’s integrated GPU capabilities).

• Video ports: 2x DisplayPort 1.2, 1x HDMI 1.4, 1x DVI-D and 1x VGA (adapter use may be required).
• Maximum of two active external displays alongside or instead of the notebook screen depending on model.
• DisplayPort supports higher resolutions and MST daisy-chaining when supported by the laptop.

What ports and peripherals does the dock provide?

This dock consolidates common desktop ports so you can connect wired LAN, fast storage, mice, keyboards and other accessories with a single plug to your laptop. Both USB 3.0 and USB 2.0 ports are included for backward compatibility.

• Six total USB ports: 3x USB 3.0 for high-speed devices and 3x USB 2.0 for legacy peripherals.
• Gigabit Ethernet (RJ-45) for reliable wired network connections in office environments.
• Combined audio/pass-through and options for external displays and adapters.

Does the dock supply power and what adapters are included?

The package includes a Lenovo 90W US two-prong AC adapter to power the dock and charge compatible ThinkPad laptops while connected. This 90W power solution suits many mainstream ThinkPads but not high-power workstations.

• Included: ThinkPad US 90W AC adapter (two-prong) to power the dock and laptop.
• Recommended for laptops rated 65W or 90W; avoid pairing with models that list 170W requirements.
• Check your laptop’s documentation to confirm compatibility with the 90W dock before purchase.

Who is this for? The Lenovo ThinkPad USA Ultra Dock 90W is ideal for professionals, remote workers and hot-desk environments who use compatible ThinkPad notebooks and need to switch quickly between mobile and desktop setups. Choose this dock if you want wired Ethernet, multiple USB ports, and flexible monitor connections with a single, manufacturer-supported docking solution — but verify your laptop’s power and graphics requirements against the dock’s 90W and integrated-graphics limits.