Dell Pro SD25TB4 User Manual

Thunderbolt 4 smart dock

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Dell Pro Thunderbolt 4 Smart Dock SD25TB4

User's Guide

Regulatory Model: K23A

Regulatory Type: K23A002

April 2025

Rev. A00

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Page 1 Dell Pro Thunderbolt 4 Smart Dock SD25TB4 User's Guide Regulatory Model: K23A Regulatory Type: K23A002 April 2025 Rev. A00...
Page 2 A WARNING indicates a potential for property damage, personal injury, or death. © 2025 Dell Inc. or its subsidiaries. All rights reserved. Dell Technologies, Dell, and other trademarks are trademarks of Dell Inc. or its subsidiaries. Other trademarks may be trademarks of their respective owners.
Page 3: Table Of Contents
Contents Chapter 1: Introduction......................... 4 Chapter 2: Package contents......................5 Chapter 3: Views of Dell Pro Thunderbolt 4 Smart Dock SD25TB4..........6 Top......................................6 Front....................................... 7 Right......................................7 Back......................................8 Bottom....................................9 Chapter 4: Hardware requirements....................10 Chapter 5: Important Information....................11 Chapter 6: Setting up your docking station..................
Page 4: Chapter 1: Introduction
Introduction The Dell Pro Thunderbolt 4 Smart Dock SD25TB4 is a device that connects all your electronic devices to your computer through a Thunderbolt 4 (USB Type-C) cable interface. Connecting your computer to the dock allows for connection of multiple peripherals.
Page 5: Chapter 2: Package Contents
Your docking station ships with the components shown below: ● Docking station ● Power adapter and power-adapter cable ● Documentation (Quick Start Guide; Safety, Environmental, and Regulatory Information) Figure 1. Contents of Dell Pro Thunderbolt 4 Smart dock SD25TB4 box NOTE: Contact Dell support from Dell Support Site if any of the listed items are missing from your box.
Page 6: Chapter 3: Views Of Dell Pro Thunderbolt 4 Smart Dock Sd25Tb4
NOTE: When the Dell Pro Thunderbolt 4 Smart Dock is connected to supported Dell computers or non-Dell computers with Power Delivery 3.1 capability, the dock button functions like the power button of your computer. This allows you to use it to power on, sleep, wake, or force shut down the computer.
Page 7: Front
1. Wedge-shaped lock slot Connect a security cable to prevent unauthorized movement of your docking station. 2. Kensington security-cable lock slot Connect a security cable to prevent unauthorized movement of your docking station. Views of Dell Pro Thunderbolt 4 Smart Dock SD25TB4...
Page 8: Back
Connect a power adapter to provide power to your docking station. 7. USB 3.2 Gen 2 (10 Gbps) port Connect devices such as external storage devices and printers. Provides a data transfer speed of up to 10 Gbps. Views of Dell Pro Thunderbolt 4 Smart Dock SD25TB4...
Page 9: Bottom
Figure 6. Bottom view 1. Service Tag label The Service Tag is a unique alphanumeric identifier that enables Dell service technicians to identify the hardware components in your docking station and access warranty information. Views of Dell Pro Thunderbolt 4 Smart Dock SD25TB4...
Page 10: Chapter 4: Hardware Requirements
Hardware requirements Before you start using the docking station, ensure that your computer has a Thunderbolt port (recommended) over USB Type-C or a USB Type-C with DisplayPort Alt Mode that is compatible with the docking station. Hardware requirements...
Page 11: Chapter 5: Important Information
● When the docking station is not in use, store the dock and its cables in a manner that prevents compression and other forms of damage. Drivers and Downloads FAQ When troubleshooting, downloading, or installing drivers, it is recommended that you read the Dell Knowledge Base article, Drivers and Downloads FAQ 000123347. Important Information...
Page 12: Chapter 6: Setting Up Your Docking Station
Setting up your docking station Steps 1. Update your computer's BIOS, graphics, thunderbolt, and network drivers from Drivers at Dell Support Site. NOTE: Thunderbolt driver updates are only for computers that are natively configured with Thunderbolt hardware and is not applicable for Non-thunderbolt computers.
Page 13 The above table shows the different video port combinations available to connect multiple displays to the Dell Pro Thunderbolt 4 Smart dock SD25TB4. For more details on supported display resolutions, see Display Resolution. Setting up your docking station...
Page 14: Chapter 7: Setting Up External Monitors
Setting up external monitors Configuring your monitors To connect multiple displays, follow these steps: Steps 1. Click the Start button, and then select Settings. 2. Click System and select Display. Setting up external monitors...
Page 15: Multiple Display Setup
The display topology can be configured, by moving around the displays in the "Select and rearrange displays" section, to change where the operating system assumes these monitors are located. Multiple display setup The Dell Pro Thunderbolt 4 Smart Dock SD25TB4 supports multiple video output configurations with 2, 3 and 4 external displays. NOTE: The SD25TB4 docking station supports non-Thunderbolt devices, but these devices will not be able to take advantage of Thunderbolt features.
Page 16 Dual-display setup Figure 7. Dual-display setup Table 1. Dual-display connection Number of displays Connector one Connector two Two (Up to 6K @ 60 Hz) DisplayPort 1.4 port DisplayPort 1.4 port DisplayPort 1.4 port HDMI 2.1 port DisplayPort 1.4 port MFDP Type-C port/Thunderbolt port HDMI 2.1 port MFDP Type-C port/Thunderbolt port Thunderbolt port...
Page 17 Triple-display setup Figure 8. Triple-display setup Table 2. Triple-display connection Number of displays Connector one Connector two Connector three Three (Up to 4K @ 60 DisplayPort 1.4 port HDMI 2.1 port MFDP Type-C port/Thunderbolt port DisplayPort 1.4 port DisplayPort 1.4 port HDMI 2.1 port DisplayPort 1.4 port DisplayPort 1.4 port...
Page 18: Display Bandwidth
Quad-display setup Figure 9. Quad-display setup Table 3. Quad-display connection Number of Connector one Connector two Connector three Connector four displays Four (Up to 4K @ DisplayPort 1.4 DisplayPort 1.4 port HDMI 2.1 port MFDP Type-C port/ 60 Hz) port Thunderbolt port DisplayPort 1.4 HDMI 2.1 port...
Page 19: Display Resolution Table
Display Resolution Table Display resolution table for computers without Thunderbolt ports Table 5. Display resolution table for computers without Thunderbolt ports Display Port Single Display Dual Display Triple Display (maximum Quad Display (maximum Available (maximum (maximum resolution) resolution) Bandwidth resolution) resolution) HBR3 (HBR3 x 2 DP 1.4/HDMI 2.1/...
Page 20 Table 5. Display resolution table for computers without Thunderbolt ports (continued) Display Port Single Display Dual Display Triple Display (maximum Quad Display (maximum Available (maximum (maximum resolution) resolution) Bandwidth resolution) resolution) ● 6K (6144 x 3456) ● DP 1.4 + HDMI ●...
Page 21 Table 6. Display resolution table for computers with Thunderbolt ports (continued) Display Port Single Display Dual Display Triple Display (maximum Quad Display (maximum Available (maximum (maximum resolution) resolution) Bandwidth resolution) resolution) 1. One 5K ● DP 1.4 + MFDP Type-C 2. One QHD (2560 x WUHD (5120 + TBT Type-C: 1440) @ 60 Hz...
Page 22 Table 6. Display resolution table for computers with Thunderbolt ports (continued) Display Port Single Display Dual Display Triple Display (maximum Quad Display (maximum Available (maximum (maximum resolution) resolution) Bandwidth resolution) resolution) ○ 5K WUHD ● DP 1.4 + HDMI 2.1 + (5120 x 2160) TBT Type-C: @ 120 Hz...
Page 23 Table 6. Display resolution table for computers with Thunderbolt ports (continued) Display Port Single Display Dual Display Triple Display (maximum Quad Display (maximum Available (maximum (maximum resolution) resolution) Bandwidth resolution) resolution) 1. One 5K ○ 4K (3840 x 2160) @ ● Intel Core WUHD (5120 60 Hz Ultra 7 268V...
Page 24 NOTE: If higher resolution monitors are used, the graphics driver makes a judgment based on monitor specifications and display configurations. Some resolutions may not be supported and thus get removed from the Windows Display Control Panel. NOTE: Computers with Qualcomm processors support a maximum of 2 displays when connected with the dock. The maximum resolution is 4K (3840 x 2160) @ 60 Hz for a dual display setup and WUHD (5120 x 2160) @ 60 Hz for a single display setup.
Page 25: Chapter 8: Technical Specifications
3.1 capability. This feature allows you to wake your computer from any sleep state (S0, S3, S4, or S5 - S5 only applicable for non-Thunderbolt computers) remotely. For Dell computers. see the platform documentation on Dell Support Site to check compatibility.
Page 26: Power Delivery
● 130 W to Dell computers ● 96 W to non-Dell computers Power button function Sleep/Wakeup/Power button NOTE: On compatible Dell computers, the power button mimics the host power button behavior. Operating systems ● Windows 10 ● Windows 11 ● Ubuntu 24.04 ●...
Page 27: Port Disablement
● This feature is managed through the BIOS settings, requiring you to boot to the BIOS Setup Menu to enable or disable the feature. ● Port Disablement can also be handled by Dell Device Management Console. New Gen Multi-Function Display Port (MFDP) Systems A new generation of computers with MFDP Type-C ports offers the following configuration options in the BIOS: 1.
Page 28 2. Enable/Disable External USB Port to enable USB protocol over USB Type-A and Type-C ports. 3. Enable Dell Docks - dynamic override to extend system settings to the boundary of the dock (dock port that is connected to Dell Dock was fully functional, and Dock took care about handling dock port disablement locally).
Page 29: Led Status Indicators
Table 13. Legacy Thunderbolt computers (continued) BIOS setup options Docke Dell Dock syste config uratio TBT/ Working Working By system Enable Enable functio setup TBT/ Worki Working By system Enable Disabl function setup mode TBT/ Working By system Enable Disable functio...
Page 30: Remote Management Led Indicators
Table 16. Ethernet Activity Indicator (continued) Description LED Status Connected Amber (Solid) Activity On Amber (Blinking) Remote Management LED Indicators Table 17. Remote Management LED Indicator Description LED Status Awaiting Wi-Fi provisioning Attempting Wi-Fi connection White (Fast blinking) ● 1 second ON, 1 second OFF ●...
Page 31: Chapter 9: Dell Docking Station Firmware Update
SD25TB4 Administrator Guide available on Dell Support Site. Download the Dell Pro Thunderbolt 4 Smart Dock SD25TB4 driver and firmware updates from Dell Support Site. Connect the dock to your computer and open the tool as administrator.
Page 32 3. Wait for all the component firmware update to complete. A progress bar is displayed in the bottom. Figure 12. Wait for the update to complete in the SD25TB4 DFU tool 4. The update status is displayed above the payload information. Dell docking station firmware update...
Page 33 /componentsvers Display current version of all dock firmware components For IT professionals and engineers, to get more information about the following technical topics, see the Dell Docking Station Administrator Guide: ● Step-by-step standalone Dock Firmware Update (DFU) and driver update utilities.
Page 34: Chapter 10: Dell Device Management Console
● Setting configurations Configure settings for docking stations and peripherals. Resources See the following links for tutorials and instructional videos of Dell Device Management Console that is related to your Dell Pro Smart dock: ● Dell Pro Thunderbolt 4 Smart Dock SD25TB4 Videos ●...
Page 35: Chapter 11: Frequently Asked Questions
3. What is the charging station feature? ● The Dell Pro Thunderbolt 4 Smart Dock SD25TB4 can charge your phone or other USB-powered devices even when not connected to a computer. However, the AC adapter must be plugged into the docking stations for this feature to work.
Page 36: Chapter 12: Troubleshooting
Troubleshooting Table 20. Troubleshooting Symptoms Suggested solutions No video display on monitors that are connected to the 1. Update your computer's BIOS and drivers, and the docking docking station's HDMI or DisplayPort ports. station's firmware, to the latest available versions. 2.
Page 37 Table 20. Troubleshooting (continued) Symptoms Suggested solutions The USB ports on the docking station are not functioning. 1. Verify that your computer and docking station have the latest BIOS and drivers installed. Update them if necessary to ensure optimal functionality. 2. If your BIOS Setup has a USB Enabled/Disabled option, ensure that it is set to Enabled.
Page 38 ● Enable Thunderbolt Boot Support NOTE: By default, Thunderbolt Boot Support is disabled in the BIOS Setup on Dell computers. As a result, peripherals that are connected to the docking station may not function in a pre-operating system (pre-OS) environment.
Page 39 Table 20. Troubleshooting (continued) Symptoms Suggested solutions 2. If the dock still does not respond, restart the dock. 3. Enable SD25TB4 display support matrix . 4. Restart the dock. Troubleshooting...
Page 40: Chapter 13: Getting Help And Contacting Dell
Getting help and contacting Dell Self-help resources You can get information and help on Dell products and services using these self-help resources: Table 21. Self-help resources Self-help resources Resource location Information about Dell products and services Dell Site Contact Support In Windows search, type Contact Support, and press Enter.

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