Board footprint and current ceiling
The 350763-4: The 0.250" (6.35mm) pitch sets the board footprint and the per-contact current ceiling. The 0.155" (3.94mm) solder tail length suits standard 1.6mm PCBs; the through-hole termination gives a reliable mechanical anchor against cable strain.
Locking ramp and mating half
The mating receptacle accepts crimp terminals for 20-24 AWG wire. The header is keyed so the receptacle can only go on one way, preventing mis-mating in a multi-connector panel.
Tin plating and cycle life
Sourced per RFQ against your BOM quantity.
