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      ThinkPad USB 3.0 Ethernet Adapter - Overview and Service Parts


      Features and specifications

      The ThinkPad USB 3.0 Ethernet (4X90E51405) adapter enables Ethernet on systems which do not have Ethernet RJ-45 connector through USB port on the system. The ThinkPad USB 3.0 Ethernet adapter not only provides high speed Gigabit Ethernet solution via USB 3.0 port, but also enables boot over the LAN on selected ThinkPad systems.

      Connect it with your Ultrabook or Tablet to your corporate VPN at the office or go online in a hotel suite. The adapter’s small form factor allows a convenient fit into any computer case or bag to travel, so you can easily take it with you anywhere.

      Performance specifications

      • Full size RJ45 connector; LEDs on connector to indicate connection status
      • Two LEDs on RJ45 port for power and data transfer indication. Green for power and Yellow for activity.
      • Booting from LAN and loading image from remote server for selected systems. Please refer to support web site for list of systems supporting this feature.
      • QoS (Quality of Service) tagged packets and duplicate address detection
      • Doesn’t support POE (Power over Ethernet)
      • Giga bit speed when running on USB 3.0 environment
      • 100M/10M adapt when running on USB 2.0 environment
      • Full Duplex flow control(IEEE 802.3x)
      • Compliant with IEEE 802.3 and IEEE 802.3u
      • IEEE 802.3az Giga bit Ethernet requirement
      • Supported operating systems: Microsoft Windows 7 (32bit & 64bit), Microsoft Windows 8 (32bit & 64bit), Microsoft Windows 8.1 (32bit & 64bit), Microsoft Windows 10 (64-bit)

      Physical specifications

      • Ethernet receptacle (L x W x H): (53±0.5) mm x 15 mm x 16 mm
      • Cable (L x D): (80±10) mm x 3.5 mm
      • USB Plug (L x W x H): (19±0.3) mm x (14±0.3) mm x (7±0.3) mm
      • Approximate height: 3cm
      • Approximate width: 5cm
      • Approximate length: 18cm

      Drivers Operating System and Version Release Date
      ThinkPad USB3.0 Ethernet Adapter Driver (5.4 MB)
      ReadMe (2.6 KB)

      Windows 7 (32bit & 64bit) version: 7.24.504.2016
      Windows 8 (32bit & 64bit) version: 8.31.504.2016
      Windows 8.1 (32bit & 64bit) version: 8.31.504.2016
      Windows 10 (64bit) version: 10.9.504.2016
      29 July 2016

      Manuals  Version
      Release Date
      Warranty Information (1.5 MB) June 2016 4 July 2016
      Warranty Information on Lenovo Cables and Adapters (1.6 MB) June 2016 3 June 2016


      1 year – Customer Replaceable Unit (CRU)

      • Announce date: 5 November 2013
      • Availability date: 8 November 2013

      Hardware compatibility

      Supported Systems (As at June 24, 2016)

      • ThinkPad X1 Carbon, ThinkPad Helix
      • ThinkPad Tablet 2
      • ThinkPad Classic Chief River systems: T530, T430, T430s, T430u, T431s, W530, X230s,  X230t, X230, X131e, L530, L430, L330
      • ThinkPad Edge E530, E430, E330
      • Shark Bay ThinkPad Classic: X240, T440, T440s, T440p, W540, X240s, T540p, L440, L540
      • ThinkPad S240, S431, S440, S531, S540
      • ThinkPad Edge E431/E531
      • ThinkPad Edge E440/540
      • ThinkPad Edge E445/545 

      Note: Please refer to the Accessories Compatibility Guide for the complete list of supported systems.

      Software requirements

      • Microsoft Windows 7 (32-bit and 64-bit)
      • Microsoft Windows 8 (32-bit and 64-bit)
      • Microsoft Windows 8.1 (32-bit and 64-bit)
      • Microsoft Windows 10 (64-bit)

      Also work on Windows PE and Windows SCCM environment


      • Lenovo USB3.0 Ethernet Adapter
      • Warranty Poster

      Operating environment

      • Temperature: 0 deg to 70 deg C (32 deg to 158 deg F)

      Agency approvals

      • CE MARK, ICES, ACA/C-Tick, FCC, BSMI, VCCI, CB, KC, EAC, Ukraine CoC

      Service Parts

      • Description: A description of the product.
      • Geography: The geography where the product is available.
      • Marketing part number: The marketing part number is the part number used for purchasing the product.
      • Service part number (FRU): The service part number for the product or one of the product's components.
      Description Geography Marketing part number  Replacement part number (FRU)
      ThinkPad USB3.0 Ethernet Adapter Worldwide 4X90E51405 03X6840

      Personal Systems Reference (PSREF) - Comprehensive information on the features and technical specifications of Lenovo products.


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      • Alias ID:
      • Document ID: PD029741
      • Last Updated :01 Aug 2016
      • © 2016 Lenovo