34 Circuits on 1.27mm Pitch — Board-to-Board Fit
The 20021321-00034T4LF: This is a 34-position, dual-row receptacle from the Minitek127® series, on a 1.27mm mating pitch with the same 1.27mm row spacing. The 0.050" pitch sets the PCB footprint — the two rows pack 17 contacts per row, which keeps the board-edge real estate tight.
What the Gold Plating Buys You
For a board-to-board interconnect that gets disconnected during test, rework, or field upgrade, that gold layer is the difference between a reliable signal path and a noisy one after a few cycles.
For a board-stacking application, confirm the mated stack height from the header drawing; the receptacle's insulation height is 0.177" (4.50mm).