50 Positions at 2.54mm Pitch — IDC Ribbon Match
The 1-499923-0: The latch lock/eject hooks on the long sides lock the mated pair together and provide a lever to unseat the connector from the board without prying at the pins.
Gold Mating Finish and 1A Contact Rating
Voltage rating is 250VAC — suitable for signal-level and low-power circuits inside an enclosure.
Through-Hole Termination and Board Standoff
The header mounts through hole with 0.155" (3.94mm) post length — the tails extend below the board far enough for a reliable solder fillet but keep the overall contact length at 0.684" (17.37mm) from the mating face to the tail tip. The mounting flange and keying slot provide mechanical retention to the PCB and orientation keying — the keying slot prevents the socket from being installed backwards, which matters when pin-one orientation is critical for ribbon cable assemblies.