DF40GB-48DP-0.4V(58) from Hirose Electric Co Ltd is a fine-pitch board-to-board mezzanine connector designed for compact electronic assemblies that need reliable interconnect density in limited PCB space. As a 48-position, 2-row plug with 0.40 mm pitch, gold contact finish, shielded construction, and solder retention features, it is well suited for portable devices, industrial control boards, embedded modules, display assemblies, and other stacked-board architectures where signal integrity and mechanical stability matter. Engineers typically select parts in this connector class for slim designs requiring repeatable mating performance and low-profile integration. The listed product status is Active, which supports use in current production planning, although lifecycle details beyond that should still be verified through the manufacturer and authorized documentation. RoHS compliance information is not available in the provided data, so compliance should be confirmed against the official datasheet, manufacturer declarations, and current procurement records before release to regulated markets.