Right-angle unshrouded header, 39 positions
The 9-103759-0-39 is the 39-position member of the AMPMODU Mod II breakaway header line, configured as a through-hole right-angle unshrouded male pin header.
What the unshrouded breakaway means for the board fit
Unshrouded headers expose the full pin length for mating with standard AMPMODU Mod II receptacles or crimp housings. The breakaway construction allows the 39-position strip to be cut to a shorter length — the pitch and footprint are shared across the series, so match the position count to the circuit requirement.