DF40GB(1.5)-30DS-0.4V(58) from Hirose Electric Co Ltd is a fine-pitch board-to-board mezzanine receptacle designed for compact, high-density electronic assemblies where vertical space and signal integrity matter. As a 30-position, 2-row, 0.40 mm pitch surface-mount connector with a 1.5 mm mated stacking height, it is well suited for handheld devices, embedded modules, industrial control boards, medical electronics, and other space-constrained designs that require reliable interconnect performance. Gold contact finish, shielded construction, and solder retention features support stable assembly and dependable mating in dense PCB layouts. Within the Connectors, Interconnects > Rectangular - Board to Board Connectors - Arrays, Edge Type, Mezzanine category, this part fits applications that prioritize miniaturization and repeatable board stacking. Lifecycle status is currently listed as information not available, so engineers should confirm long-term supply directly with the manufacturer or authorized sources. RoHS compliance information is also not explicitly provided in the available specifications and should be verified through official Hirose documentation before release to regulated markets.