The 9-146257-0-13: This 26-position unshrouded header from the AMPMODU Mod II series mates with standard 0.100-inch pitch receptacles for board-to-board or cable-to-board connections.
The base product number 146257 covers the series; the full 9-146257-0-13 suffix specifies the 26-position, dual-row, gold-plated variant in bulk packaging.
