What This 3-Position Header Does in a Power/Signal Circuit
The 643414-1: The locking ramp (fastening type) snaps onto the mating receptacle housing, providing vibration-resistant retention without a secondary lock.
Pitch, Positions, and Footprint — What Fits on the Board
The wide pitch means the PCB traces between pads can be routed without necking down — useful for power traces that need 2–3 mm width. Compare this to the 12-position, 0.100-inch (2.54mm) pitch 1-2823056-2 receptacle (peer): that part packs four times the circuits into roughly the same board width, but at a lower per-contact current ceiling due to the tighter pitch.
It is still in regular production with no announced end-of-life or successor. The base product number 643414 covers the series variants; this specific 3-position, tin-plated version is the most commonly stocked configuration. Sourced through independent distribution channels.
The mated pair is keyed to prevent misalignment. Termination is through-hole solder — the header is inserted into the PCB and wave-soldered. The board guide (feature) centers the part during placement. The tin-plated posts (contact finish - post) are solderable with standard rosin-core solder; no special flux is required.