74-position unshrouded breakaway header
The 4-103777-0-37 is the 74-position member of the TE AMPMODU Mod II breakaway header line, dual-row at 0.100" (2.54 mm) pitch with 0.100" (2.54 mm) row spacing. Rated 3 A per contact with tin-lead plating on both the mating surface and the solder post, the header terminates through-hole and carries a UL94 V-0 thermoplastic insulator.
Position count and footprint
Within the AMPMODU Mod II 103777 base series, the 74-position 4-103777-0-37 sits at the high end of the dual-row ladder — the 0.100" (2.54 mm) pitch and 0.100" (2.54 mm) row spacing are shared across the series, so the board footprint is consistent; only the position count changes to match the circuit count.