DELL Pro Thunderbolt 4 SD25TB4 Wired Black
More Information
Reasons To Buy

Engineered for success
Maximise your AI PC productivity by seamlessly using Gen AI tools across up to four 4K 60Hz displays, staying powered with up to 130W power delivery, and connecting all your peripherals effortlessly.
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Most manageable and secure
Elevate the IT management experience by directly managing your smart docks from the Dell Device Management Console – no PC connection or software required.
Most manageable commercial dock
Reduce IT efforts by scheduling updates during off-hours, while ensuring fleetwide firmware compliance and eliminating end user interruptions.
Effortless maintenance
Remotely configure, deploy and update smart Docks over Wi-Fi via industry’s first holistic peripheral management solution.
Unlock out-of-band management on select Intel vPro® PCs with Intel® Active Management Technology (Intel® AMT) over Thunderbolt via the connected dock.
Work Smarter
Keep users working confidently with enterprise-grade WPA-3 192-bit encryption for secure Wi-Fi communication. Safeguard your sensitive data with tamper-resistant, hardware-based encryption built into your Dell Pro Thunderbolt 4 Smart Dock.

Connect your way
Configure your workspace to your liking with an ambidextrous USB-C cable that can be routed left or right.

Designed for sustainability
The Dell Pro Thunderbolt 4 Smart Dock is built with at least 65% post-consumer recycled materials and packaged with 100% recycled or renewable packaging.
Description
Specifications
| Ports & interfaces | |
|---|---|
| USB 3.2 Gen 2 (3.1 Gen 2) Type-A ports quantity | 4 |
| USB 3.2 Gen 2 (3.1 Gen 2) Type-C ports quantity | 2 |
| Host interface | Thunderbolt 4 |
| Ethernet LAN (RJ-45) ports | 1 |
| HDMI ports quantity | 1 |
| HDMI version | 2.1 |
| DisplayPorts quantity | 2 |
| Microphone in | No |
| Headphone outputs | 0 |
| DC-in jack | Yes |
| Connectivity technology | Wired |
| USB Power Delivery (USB PD) | Yes |
| PowerShare | Yes |
| Number of USB ports with PowerShare support | 4 |
| USB Power Delivery up to | 130 W |
| DisplayPort version | 1.4 |
| Thunderbolt 4 ports quantity | 2 |
| USB Type-C DisplayPort Alternate Mode | Yes |
| Network | |
| Wake-on-LAN ready | Yes |
| Ethernet LAN | Yes |
| Ethernet LAN data rates | 2500 Mbit/s |
| Ethernet LAN (RJ-45) ports | 1 |
| Performance | |
| Maximum digital resolution | 7680 x 4320 pixels |
| Number of displays supported | 4 |
| Product colour | Black |
| Card reader integrated | No |
| Cable lock slot | Yes |
| LED indicators | Yes |
| Cable lock slot type | Kensington |
| HD type | 8K Ultra HD |
| Technical details | |
| Product colour | Black |
| Cable lock slot | Yes |
| Total carbon footprint (kg of CO2e) | 93.6 |
| Storage | |
| Card reader integrated | No |
| Power | |
| Power source type | DC |
| Power connector | USB Type-C |
| Power supply | 180 W |
| Software | |
| Windows operating systems supported | Windows 10, Windows 11 |
| Mac operating systems supported | Yes |
| Linux operating systems supported | Yes |
| Other operating systems supported | ChromeOS |
| Indication | |
|---|---|
| LED indicators | Yes |
| Operational conditions | |
| Operating temperature (T-T) | 0 - 35 °C |
| Storage temperature (T-T) | -20 - 60 °C |
| Operating relative humidity (H-H) | 10 - 80% |
| Storage relative humidity (H-H) | 5 - 90% |
| Weight & dimensions | |
| Weight | 579 g |
| Width | 90 mm |
| Depth | 35.2 mm |
| Height | 205 mm |
| Design | |
| Windows operating systems supported | Windows 10, Windows 11 |
| Mac operating systems supported | Yes |
| Product colour | Black |
| Cable lock slot | Yes |
| LED indicators | Yes |
| Cable lock slot type | Kensington |
| Packaging data | |
| Quantity per pack | 1 pc(s) |
| Packaging content | |
| Quick start guide | Yes |
| Quantity per pack | 1 pc(s) |
| Carbon footprint | |
| Total carbon footprint (kg of CO2e) | 93.6 |
| PAIA version | GaBi version 1, 2025 |
| Carbon emissions, energy usage (kg of CO2e) | 60.4656 |
| Carbon emissions, manufacturing (kg of CO2e) | 30.0456 |
| Carbon emissions, logistics (kg of CO2e) | 1.9656 |
| Carbon emissions, end-of-life (kg of CO2e) | 1.1232 |
Delivery Details
- UK distributors.
- Order before 4 pm for next-day delivery.
- Standard (2-3 days) £7.50
- Next Day £9.99
- Free standard delivery over £100
There are deivery surcharges to these postcodes:
| Postcode | Charge |
| IV3-40 | £20 |
| IV52-54 | £20 |
| IV63 | £20 |
| KW1-14 | £20 |
| PA10-40 | £20 |
| PH19-40 | £20 |
| PH50 | £20 |
| HS | £50 |
| IV41-51 | £50 |
| IV55-56 | £50 |
| KA27-28 | £50 |
| KW15-17 | £50 |
| PA41-49 | £50 |
| PA60-62 | £50 |
| PA76-78 | £50 |
| PH41-44 | £50 |
| ZE | £50 |
| IM | £50 |
| JE | £50 |
| GY | £50 |
| TR21-25 | £50 |
| BT | £20 |
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|---|---|---|---|---|---|---|
| SKU |
DELL-SD25TB4
|
TB31PCIEX16
|
40AF0135DK
|
40AF0135IT
|
40AF0135BR
|
40AF0135IN
|
| Manufacturer |
DELL
|
StarTech.com
|
Lenovo
|
Lenovo
|
Lenovo
|
Lenovo
|
| Product colour |
Black
|
Black
|
Black
|
Black
|
Black
|
Black
|