DF40C-60DP-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 routing density, and reliable mating are critical. As a 60-position, 0.40 mm pitch plug with outer shroud contacts, dual rows, surface-mount termination, gold-plated contacts, and solder retention, it is well suited for portable devices, industrial control modules, communication hardware, imaging systems, and other densely packed PCB designs. Engineers typically select parts in this category for low-profile stacking, repeatable assembly, and support for modular board architectures. The listed mated stacking height options make it useful across multiple enclosure and interconnect layouts. Lifecycle status is currently information not available, so teams should confirm manufacturer status before locking it into long-life programs. RoHS compliance information is also not explicitly provided in the supplied data; engineers should verify EU RoHS and related material declarations through the official datasheet or manufacturer documentation before qualification.