What the 4.20mm Pitch and Vertical Orientation Mean for Your Board
The 10127820-2022LF: It mounts vertically through-hole, so the header stands perpendicular to the PCB. The 0.138" (3.50mm) post length gives enough solder tail for a standard 1.6mm board thickness with a wave-solder fillet on the bottom side.
Shrouded 4-Wall and Locking Ramp — Vibration-Ready Mating
Tin Plating and Contact Finish — What 80µin Buys You
The brass base material gives good spring properties in the contact beam. In practice, the 4.20mm pitch and tin-plated contacts support several amps per circuit with proper wire sizing; the housing's UL94 V-0 nylon 6/6 handles the thermal load.
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The 10127820-2422LF is the same Minitek® Pwr 4.2 header in a 24-position variant — same 4.20mm pitch, same shrouded 4-wall, same locking ramp, same tin plating.