Lenovo 40A90090US ThinkPad USB-C UltraDock 90W — main product image

Lenovo 40A90090US ThinkPad USB-C UltraDock 90W

Lenovo

Lenovo 40A90090US ThinkPad USB-C UltraDock 90W

Name: Lenovo 40A90090US ThinkPad USB-C UltraDock 90W
Brand: Lenovo
SKU: 40A90090US

★★★★★3.9 (508 reviews)

UHDFHD90W60WUSB-C

One USB-C cable replaces your entire peripheral chain — the ThinkPad UltraDock 90W adds dual displays, five USB ports, Ethernet, and 60W power delivery to any compatible laptop.

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Overview

The Lenovo ThinkPad USB-C UltraDock (40A90090US) is a 10-port USB-C docking station that converts a single USB-C connection into a full desktop workstation configuration: two DisplayPort outputs, five USB-A ports across two speed tiers, Gigabit Ethernet, a 3.5mm headset jack, and up to 60W Power Delivery back to the host laptop. The display subsystem supports either dual FHD (1920x1080) outputs or a single UHD (3840x2160) output at 30Hz — a meaningful distinction, because 30Hz at 4K produces visibly sluggish cursor and window movement that most professionals find uncomfortable for extended use. The 90W AC adapter delivers 60W to the laptop, which covers the charge requirements of ThinkPad ultrabook lines but may fall short of workstation-class models under sustained load.

This dock is purpose-built for ThinkPad professionals who need a repeatable, cable-managed desk setup. The validated compatibility list — T470, T470s, T570, P51s, X1 Yoga 2nd Gen, Yoga 370, X1 Carbon 5th Gen, X270, among others — reflects Lenovo's driver and firmware testing for reliable hot-plug behavior and sleep/wake recovery. The USB 3.0 port tier supports external SSDs, capture devices, and other bandwidth-sensitive peripherals at up to 5 Gbps, while USB 2.0 ports handle keyboards, mice, and audio interfaces without contention. The form factor (6.73" x 3.15") is designed to sit beside a monitor base or along a desk edge. For any ThinkPad user on the validated list running dual FHD monitors, this dock delivers a genuinely seamless one-cable workflow.

Key Features

3x USB 3.0 ports, 2x USB 2.0 ports.

1x USB Type-C port, 2x Display Port, 1x Ethernet RJ45 port, 3.5mm Headset jack.

Includes 90w AC power supply (Supports up to 60W Power Delivery).

Supports up to Two Displays (Single UHD display at 30Hz or dual FHD displays).

Compatible with USB-C laptops, please check your system ports and description below (some models include T470, T470s, T570, P51s, X1 Yoga 2nd Gen, Yoga 370, X1 Carbon 5th Gen, X270).

Specifications

Model

40A90090US

Host Interface

USB-C

USB-A Ports

3x USB 3.0, 2x USB 2.0

USB-C Ports

1x USB-C

Display Outputs

2x DisplayPort

Max Display Config

Single UHD @ 30Hz or Dual FHD

Network

1x Ethernet RJ45

Audio

3.5mm Headset Jack

Power Supply

90W AC

Power Delivery

Up to 60W

Total Ports

Dimensions

6.73" L x 1.28" W x 3.15" H

Weight

10.24 oz

Color

Black

Pros & Cons

👍 Pros

Dual DisplayPort outputs support two FHD displays simultaneously or one UHD display — eliminating the single-monitor limitation of most USB-C adapters
5 USB-A ports (3x USB 3.0 + 2x USB 2.0) plus 1x USB-C provides enough bandwidth-tiered expansion to support a full desktop peripheral set
Gigabit Ethernet via RJ45 provides a stable, low-latency wired network connection that Wi-Fi cannot consistently match for video calls or large file transfers
90W AC adapter with 60W Power Delivery charges compatible ThinkPads through the same USB-C cable used for data and display — single-cable docking
3.5mm headset jack integrates audio into the docking solution without requiring a separate adapter

👎 Cons

Single UHD display is capped at 30Hz — insufficient for smooth cursor movement and video playback at 4K; modern docks at this price point support UHD at 60Hz
60W Power Delivery may not fully charge high-TDP ThinkPad workstation models under CPU/GPU load, requiring the laptop's own power adapter alongside the dock
The dock is validated against a specific list of ThinkPad models; use with unlisted or non-Lenovo hardware carries compatibility risk that is not covered by Lenovo support
No Thunderbolt support — bandwidth is constrained to USB 3.1 Gen 1 speeds (5 Gbps total bus), which creates a bottleneck when driving two displays and multiple high-speed USB 3.0 devices simultaneously
Physical dimensions (6.73" x 3.15" x 1.28") and 10.24 oz weight make this a desk-only dock — not practical for mobile use

Frequently Asked Questions

What is the maximum display configuration the 40A90090US supports?

The dock supports up to two simultaneous displays via its two DisplayPort outputs. The ceiling is either a single UHD (3840x2160) display at 30Hz, or dual FHD (1920x1080) displays. You cannot run one UHD and one FHD simultaneously at full resolution — it is one or the other configuration.

How much power does the dock deliver to the connected laptop?

The dock ships with a 90W AC power supply and delivers up to 60W via USB Power Delivery to the host laptop. This is sufficient to charge most ThinkPad ultrabooks during use, but high-TDP ThinkPad workstation models (P-series, for example) may require their own charger to maintain battery level under sustained load.

Is the 40A90090US compatible with non-Lenovo USB-C laptops?

The dock uses a standard USB-C connection and is technically compatible with any USB-C laptop that supports DisplayPort Alt Mode and USB Power Delivery. However, Lenovo explicitly validates compatibility with specific ThinkPad models including the T470, T470s, T570, P51s, X1 Yoga 2nd Gen, Yoga 370, X1 Carbon 5th Gen, and X270. Compatibility with non-Lenovo hardware is not guaranteed and may involve driver or display limitations.

How many USB ports does the dock provide, and what are their speeds?

The dock provides 5 USB-A ports total: 3x USB 3.0 (SuperSpeed, up to 5 Gbps) and 2x USB 2.0 (up to 480 Mbps), plus 1x USB-C port. For peripherals like external SSDs or high-bandwidth devices, use the USB 3.0 ports. USB 2.0 ports are suitable for keyboards, mice, and other low-bandwidth devices.

Does the dock include audio output?

Yes. The dock includes a 3.5mm headset jack that passes audio from the host laptop, allowing you to connect headphones or speakers without requiring a separate USB audio adapter.