The Hirose DF81D-30P-0.4SD(52) is a 30-position plug from the DF81 series, built for discrete or ribbon cable termination at a tight 0.40 mm pitch.
This plug accepts a wide wire range: 34-36 AWG and 36-46 AWG, covering the fine conductors common in FPC assemblies and micro-coaxial cables. Termination is solder — a direct connection to the outer shroud contacts, no crimp tool required. The free-hanging mount means it terminates to the cable end, not to a board, so the assembly stays flexible for routing inside a tight enclosure. Give it strain relief or the solder joint pulls apart under cable flex.