Overview
The Dell Pro Thunderbolt 4 Smart Dock SD25TB4 is an enterprise docking station that connects compatible notebooks to multiple displays, USB peripherals, wired networking, and external power through a Thunderbolt 4 host connection. It supports up to four external displays and provides 2.5 Gigabit Ethernet for high-speed wired networking.
Thunderbolt 4 Connectivity
The SD25TB4 uses Thunderbolt 4 over USB Type-C as its docking interface and includes two Thunderbolt 4 ports. The Thunderbolt connection supports high-bandwidth peripheral connectivity and enables multi-display configurations when supported by the host system.
Power Delivery
The dock uses a 180W AC power adapter and delivers up to 130W to compatible Dell commercial notebooks. Non-Dell systems can receive up to 96W of Power Delivery, subject to system requirements and USB-C charging support.
Display Connectivity
Video interfaces include two DisplayPort 1.4 ports, one HDMI 2.1 port, and one USB-C 3.2 Gen 2 multi-function DisplayPort 1.4 port. With Display Stream Compression, supported configurations can reach four 4K displays at 60Hz, two 6K displays at 60Hz, or one 8K display at 60Hz. Without DSC, the dock supports configurations including up to two 4K displays at 60Hz.
USB Connectivity
The SD25TB4 provides four USB-A 3.2 Gen 2 data ports and one USB-C 3.2 Gen 2 data port, all supporting up to 10Gbps data transfer. Additional USB-C and Thunderbolt ports provide both data connectivity and power for compatible peripherals.
Network Connectivity
An RJ45 2.5GbE interface provides high-speed wired Ethernet connectivity. The dock also supports enterprise networking features including MAC address pass-through, PXE Boot, Wake-on-LAN, and WLAN-to-LAN switching.
Smart Management
The SD25TB4 provides centralized management capabilities for enterprise deployments. Dell supports remote firmware updates without a connected PC, host-based firmware updates, firmware updates on disconnect, and independent port disablement. Dell Device Management Console can also provide cloud-based dock management without requiring a PC connection.
Security and Enterprise Features
The dock supports Intel AMT over Thunderbolt with select Intel vPro PCs and includes kernel Direct Memory Access protection. Physical security features include a Kensington lock slot and a wedge-shaped lock slot.
Key Features
- Thunderbolt 4 docking interface with two Thunderbolt 4 ports
- Up to 130W Power Delivery for compatible Dell commercial notebooks
- Up to four external displays with DSC-supported configurations
- 2.5 Gigabit Ethernet with enterprise networking features
- Remote firmware and cloud-based dock management capabilities
Applications
The SD25TB4 is suited to enterprise laptop deployments, managed office workstations, multi-monitor environments, IT-managed desks, and users requiring centralized Thunderbolt, display, USB, Ethernet, and power connectivity.
DC Supplies Product Note
The SD25TB4 is the Smart Dock variant of Dell's Pro Thunderbolt 4 docking platform. Its remote firmware and device-management capabilities make the exact model particularly relevant for standardized commercial and enterprise deployments.
Specifications
| Specification | Details |
|---|
| Brand | Dell |
| Part Number / MPN | SD25TB4 |
| Product Type | Thunderbolt 4 Smart Dock |
| Docking Interface | Thunderbolt 4, USB Type-C |
| Maximum Power Supply | 180W AC |
| Power Delivery | Up to 130W Dell systems; up to 96W non-Dell systems |
| Thunderbolt | 2 × Thunderbolt 4 |
| DisplayPort | 2 × DisplayPort 1.4 |
| HDMI | 1 × HDMI 2.1 |
| USB-C DisplayPort | 1 × USB-C 3.2 Gen 2 Multi-function DisplayPort 1.4 |
| USB-A Data | 4 × USB-A 3.2 Gen 2, 10Gbps |
| USB-C Data | 1 × USB-C 3.2 Gen 2, 10Gbps |
| USB-A Power | 4 × 4.5W |
| USB-C Data Power | Up to 15W |
| Thunderbolt Power | Up to 15W per Thunderbolt 4 port |
| Ethernet | RJ45 2.5 Gigabit Ethernet |
| Maximum Displays | Up to 4 |
| Maximum Display Support with DSC | 4 × 4K 60Hz; 3 × 4K 60Hz; 2 × 6K 60Hz; 1 × 8K 60Hz |
| Display Support without DSC | 4 × QHD 60Hz; 3 × WQHD 60Hz; 2 × 4K 60Hz; 1 × 5K WUHD 60Hz |
| Host Management | Intel AMT over Thunderbolt on select Intel vPro PCs, MAC address pass-through, PXE Boot, Wake-on-LAN |
| Dock Management | Remote firmware updates, host-based updates, firmware update on disconnect, independent port disablement |
| Cloud Management | Dell Device Management Console |
| Security | Kensington lock slot, wedge-shaped lock slot, kernel DMA protection |
| Operating Systems | Windows 10, Windows 11, Ubuntu 24.04, Red Hat Enterprise Linux 9.6+, ChromeOS 137, macOS |
| Thunderbolt Certification | Thunderbolt 4 certified |
| Dimensions | L 8.07 × W 3.54 × H 1.39 inches |
| Weight | 1.28 lbs without power adapter |
| Cable Length | 0.83 m |
| Warranty | 3-Year Limited Hardware Warranty with Advanced Exchange |
FAQs
What is the Dell SD25TB4?
The SD25TB4 is Dell's Pro Thunderbolt 4 Smart Dock, designed to provide centralized display, USB, Ethernet, peripheral, and notebook power connectivity.
How much power does the SD25TB4 provide?
It provides up to 130W to compatible Dell commercial notebooks and up to 96W to non-Dell systems.
How many displays can the SD25TB4 support?
The dock supports up to four external displays. Supported resolutions depend on the host system, connection configuration, and whether Display Stream Compression is available.
Does the SD25TB4 have 2.5GbE?
Yes. It includes an RJ45 2.5 Gigabit Ethernet port.
Does the SD25TB4 support remote management?
Yes. Dell provides remote firmware management and Dell Device Management Console capabilities for centralized dock administration.
What is the difference between SD25TB4 and a standard USB-C dock?
The SD25TB4 uses Thunderbolt 4 and adds high-bandwidth peripheral connectivity, advanced multi-display support, and enterprise smart-management features.
