DF40GB-30DP-0.4V(58) from Hirose Electric Co Ltd is a fine-pitch board-to-board mezzanine connector designed for compact electronic assemblies where space, signal integrity, and reliable mating performance are critical. As a 30-position, 2-row surface-mount plug with 0.40 mm pitch, shielded construction, and solder-retention features, it is well suited for portable devices, industrial control modules, embedded computing boards, communication equipment, and other dense PCB stacking applications. The 1.5 mm mated stacking height supports low-profile product designs while gold contact finish helps support stable electrical connection in repeated assembly environments. Based on the provided information, lifecycle status is unknown, so engineers should verify current manufacturer status before locking it into new designs. RoHS compliance information is not available in the supplied specifications, so compliance should be confirmed through official Hirose documentation or manufacturer-backed declarations, especially for projects shipping into EU and other regulated markets.