DF40C-10DP-0.4V(58) from Hirose Electric Co Ltd is a compact board-to-board rectangular connector designed for dense interconnect layouts where space, profile height, and mechanical stability matter. As part of the DF40 series, it is suited to portable electronics, embedded modules, industrial control boards, compact communication devices, and other multilayer PCB assemblies that require fine-pitch mezzanine connections. Engineers typically select this type of connector for reliable high-density mating, low-profile packaging, and SMT-friendly assembly, with solder retention supporting manufacturing robustness. Based on the provided data, this part is supplied in tape-and-reel packaging for automated placement and is positioned for volume production environments. Lifecycle status is currently listed as unknown, so design teams should confirm current manufacturer status before committing to long-term programs. RoHS compliance information is not explicitly provided in the supplied specifications, so engineers should verify RoHS and any REACH declarations directly from Hirose documentation or authorized sourcing channels before release to regulated markets.