The WD19 uses the laptop’s USB-C video support. The D6000 uses DisplayLink software for its USB graphics outputs and can connect over USB-A. Neither is a universal fit.
For Dell Latitude 5420
Dell WD19
Yes, for screens and laptop charging, with the parts listed here.
Connection
USB-C
Screen examples
2 Full HD screens at 60 Hz through USB-C
Laptop charging
Dell 130 W 7.4mm AC adapter (46TR4): up to 90 W through USB-C
Dell 180 W 7.4mm AC adapter (GJPT6): up to 130 W through USB-C
Dell 130 W 7.4mm AC adapter (UK) (R1R51): up to 90 W through USB-C
Requirements
Dell WD19-compatible 130 W or 180 W power supply with a 7.4 mm plug. Laptop charging power depends on the supply used.
Windows; office use. Examples are not an exhaustive screen limit.
Use the specified power supply and original computer cable. Output ceilings do not guarantee charging speed or full-load power. USB peripheral, Ethernet, audio and power-button behaviour are outside this check.
Choose for the setup, not the higher number
If software installation is prohibited, the D6000’s DisplayLink requirement matters more than its headline screen count. If one-cable charging matters, check the laptop’s power requirement and the exact dock supply; a working USB-A screen connection cannot charge it.
WD19, WD19S and WD19TB are separate products. This comparison is for the original WD19 and D6000, not those variants or the D6000S.