The 2842122-8: The 0.157" (4.00 mm) mating pin length provides a solid wipe depth inside a standard AMPMODU receptacle.
Sourcing and lifecycle for 2842122-8
How this header compares to 1376779-2
The 1376779-2 carries a higher current rating of 3 A and a voltage rating of 250 VAC, and is packaged in a box rather than bulk. For a buyer comparing the two, the 2842122-8 is the lower-current variant; if the circuit load stays under 2 A, the 2842122-8 is the correct BOM fit.
This is the header half of a board-to-board interconnect — it mates with a standard AMPMODU receptacle housing (not included).