DF40C-80DP-0.4V(58) from Hirose Electric Co Ltd is a fine-pitch board-to-board mezzanine connector designed for compact electronic assemblies that need high contact density and reliable interconnect performance. As an 80-position, 2-row surface-mount plug with outer shroud contacts, gold contact finish, and solder retention feature, it is well suited for space-constrained designs such as portable devices, industrial control modules, embedded computing platforms, displays, and communication hardware. The 0.40 mm pitch and multiple mated stacking height options make it useful where engineers need layout flexibility across tightly stacked PCBs. From a sourcing perspective, the listed supply status indicates shortage, so procurement teams should plan for lead-time variability and validate inventory early in the design cycle. Lifecycle status is currently unknown based on the provided data, so users should confirm long-term availability with Hirose or authorized sources. RoHS compliance information is not available in the provided specifications and should be verified through official manufacturer documentation before release to production.