Position count across the Mod II breakaway line
The 39-position 9-103765-0-39 sits above the 36-position and below the 40-position members of the same AMPMODU Mod II single-row breakaway series — the 0.100" pitch, unshrouded footprint, and gold/tin plating scheme are shared across the line, so the board layout and mating half are common; the position count alone determines circuit fit.
