Board-fit and footprint match
The 282822-4: The 5.00 mm pitch and 4 positions define the PCB footprint: a single-level through-hole header with a 0.138" (3.50 mm) contact tail length, vertical orientation, and a shrouded (2 side) keying profile that prevents mis-mating with the terminal block receptacle.
Solder termination to the PCB — the through-hole tail length of 0.138" (3.50 mm) suits standard board thicknesses up to 1.6 mm.
