The Hirose DF36-50P-0.4SD(51) is a 50-position plug from the DF36 series, built for high-density, fine-pitch interconnects.
Wire Gauge and Termination Reality
This plug accepts 42-46 AWG discrete wire — that's hair-thin, typically used in micro-coaxial or fine-signal cable assemblies. The solder termination means you're hand-soldering or using a micro-solder pot; there's no crimp barrel. The outer shroud contact design suggests the ground or shield path runs through the shell, so the solder joint needs to be clean and the wire prep precise. A proper fixture or microscope is expected for assembly at this wire size.
The latch holder fastening type gives positive retention — it clicks home and stays there under vibration, which matters for a 50-position connector where a partial mate would drop multiple signals. The mating half is the corresponding DF36 series receptacle (typically a board-mount or another free-hanging plug, depending on the application); the 0.40mm pitch and 50-position count must match exactly.