40-position hybrid signal/power layout
The 10159559-A30221RLF: This ComboStak receptacle carries 40 total positions split as 30 signal and 10 power contacts — a hybrid layout that keeps signal and power routing separate on the same board-to-board interface. The 0.80 mm pitch on the mating face sets the PCB trace fan-out density; at this pitch the per-contact current is limited more by the pin spacing than by the contact itself. Four mated stack heights are supported — 9 mm, 10 mm, 11 mm, and 12 mm — giving flexibility for mezzanine card spacing in a single board layout.
Detent lock and surface-mount retention
Board guide, pick-and-place pad, and solder retention features are built into the housing — the pick-and-place surface aids automated assembly, and the solder retention anchors the part during reflow.
Peer comparison: 14-position sibling vs. this 40-position
The closest functional sibling is 10159559-410221RLF — same series, same 0.80 mm pitch, same stack heights, same gold plating, but 14 positions (10 signal + 4 power) instead of 40 (30 + 10). The 40-position version is the higher-density choice for boards needing more signal and power circuits in the same footprint.