6.35mm pitch, 12-position, tin-plated header — what it buys the design
The 643428-1: The 0.250" (6.35mm) pitch sets the board footprint and the per-contact current ceiling — at the tin-plated interface, the rated current stays within the housing material limit without excessive temperature rise. 12 positions, all loaded, in a 3-row arrangement with 0.250" (6.35mm) row spacing — the layout gives you a compact but serviceable matrix for wire-to-board power or signal distribution.
Universal MATE-N-LOK series — locking ramp and board guide
Through-hole solder termination — board layout fit
Through-hole mounting with 0.155" (3.94mm) post length — the solder tails protrude enough for a reliable wave-solder fillet on standard 1.6mm PCBs. The 0.580" (14.73mm) insulation height gives clearance for wire dressing and mating receptacle entry — factor this into your z-height budget for the enclosure. Phosphor bronze contact material provides good spring retention and corrosion resistance in the tin-plated interface.
Sourcing and lifecycle — what to expect
Supplied in tray packaging — suitable for hand-load or pick-and-place with tray feeders.
Peer comparison — 1-2823056-2 vs 643428-1
The 1-2823056-2 is a 12-position receptacle on 0.100" (2.54mm) pitch, surface-mount, with forked rectangular contacts — it is not a direct cross for the 643428-1's 0.250" (6.35mm) pitch through-hole header. The pitch and mounting style differ completely. The 1376775-2 and 1376775-3 are 5- and 3-position receptacles on a different series — lower position count, gold-plated contacts, and box packaging. Not a functional replacement for the 12-position 643428-1.