The 68779-140HLF: For a 40-pin signal harness carrying 2A per circuit, the total current is well within the derating envelope at room ambient.
Board Layout Fit: Pitch, Stack Height, and Keep-Out
The 0.318" (8.08mm) solder post length provides enough protrusion through a 1.6mm board for a reliable through-hole solder fillet. Overall contact length is 0.736" (18.69mm), with a 0.318" mating pin length — this gives the mating socket enough wipe distance to establish contact without bottoming out. The unshrouded design means no polarisation key; the board layout must ensure the mating connector orientation is correct, as a 180° rotation will still mate but may misalign the circuit mapping.
The base product number 68779 covers multiple plating and post-length variants; the -140HLF suffix specifies the 40-position, gold-plated, 0.318" post configuration.
Peer Comparison: 40 vs 36 Positions in the Same Series
The board footprint grows by 0.400" in length, while the current rating and gold plating remain identical. For a BOM that needs 40 signal lines, this part avoids a second connector and the associated harness split.