Pitch, Pinout, and Footprint for the BOM
The 98414-F06-40ULF: That gives you a 1.6"-wide footprint across the board edge, with all 40 positions loaded. The pinout is straightforward: 2 rows × 20 positions per row, square male pins, 0.157" mating length and 0.098" post length for the solder tails.
What the Gold Flash Means for Mating Cycles
It's fine for a one-time board-to-board or cable connection in a production assembly, but if this header sees repeated field-service disconnects, the flash will wear through and expose the nickel underplate. For high-cycle duty, you'd want a thicker gold (15 µinch or more).
Latch and Keying: Vibration and Mis-Mate Protection
There's also a keying slot in the shroud, so you can't insert the plug backwards. The shroud is a full 4-wall enclosure around the pins, protecting them from bent-contact damage during handling.
Current, Voltage, and Flame Rating
That's a signal-level current, not power — the 2.00mm pitch and flash gold limit the continuous current before the temperature rise hits the housing limit. Contact material is copper alloy, standard for this class.