Dell Latitude 7455 + Dell Pro Smart Dock SD25 compatibility
Supported according to the current manufacturer compatibility matrix
Dell explicitly supports this Qualcomm laptop/dock pairing, with a maximum of two displays through the dock; a third display may be connected directly to the notebook.
Why this answer is stronger than a port-only match
USB-C, USB4 and Thunderbolt specifications can suggest that two products should communicate, but an explicit manufacturer compatibility matrix is more specific. On this site, exact pair-level evidence takes priority over standards-based inference.
Display considerations
Dell confirms USB4 40Gbps, DisplayPort and Power Delivery; the cited port specification does not state a dock display ceiling. The manufacturer limits this exact pairing to 2 displays through the dock.
The dock's encoded Windows ceiling is 4. These are ceilings, not promises that every laptop can drive that many displays at every resolution and refresh rate.
Charging
This dock profile can provide up to 130W to this laptop brand. Charging is evaluated separately from data/video compatibility because a dock can function while charging more slowly than the original adapter.
Evidence
- Exact pair matrix: Dell Docks Compatibility Guide — updated June 26, 2025
- Laptop specification: Dell Latitude 7455 Owner's Manual
- Dock specification: Dell Pro Smart Dock SD25 User's Guide
Check your exact monitor setup
The manufacturer pair matrix answers whether the products are supported together. Your display count, resolution, refresh rate and charging requirement can still impose additional limits.