Board-to-wire header for power and signal
The 3-350943-0: This is a 3-position, single-row header from TE's Universal MATE-N-LOK series, designed for board-to-cable/wire applications. The 0.250" (6.35mm) pitch gives you room to route heavier traces on the PCB without crowding. It's a right-angle through-hole mount, so the header sits parallel to the board surface — useful when the enclosure height is tight and you need the cable exit low.
Current rating and contact finish
That gold thickness handles repeated mate/unmate cycles in environments where tin would fret — think field-service gear or test equipment that gets reconnected regularly. The locking ramp fastening type gives a positive click when mated, so vibration won't walk the connector loose. The 4-wall shrouding protects the pins from damage during handling and mis-mating.
Sourcing and compliance
ROHS3 compliant, with a UL94 V-0 nylon housing. The mounting flange on the header gives you an extra mechanical anchor point to the board if the application sees cable strain.