DF40C-34DP-0.4V(58) from Hirose Electric Co Ltd is a fine-pitch rectangular board-to-board connector designed for compact electronic assemblies that need reliable interconnection in space-constrained layouts. As a 34-position, 2-row SMT plug with outer shroud contacts, gold contact finish, and solder retention feature, it is well suited for portable devices, industrial control modules, embedded systems, and other high-density PCB designs where stable mating and assembly performance matter. The listed status is Active, which supports its positioning for ongoing design and maintenance requirements, although the broader lifecycle field is marked unknown and should still be verified against current manufacturer documentation. From a sourcing perspective, supply is indicated as sufficient, making it a practical option for procurement planning. RoHS compliance information is not explicitly provided in the available specifications, so engineers and buyers should confirm RoHS and any related material declarations directly with Hirose or authorized documentation before use in regulated markets.