DF36A-30S-0.4V(51) from Hirose Electric Co Ltd is a fine-pitch rectangular receptacle connector in the DF36 family, designed for compact board-level interconnects where high contact density and surface-mount assembly are important. With 30 positions, 0.40 mm pitch, gold contact finish, and tape-and-reel packaging for automated placement, it fits portable electronics, embedded control boards, display modules, and other space-constrained designs. Engineers typically choose parts in this category for reliable signal interconnection, compact mechanical profiles, and repeatable SMT processing. Based on the available data, this part has an unknown lifecycle status, so design teams should confirm current manufacturer support before committing it to long-life programs. Supply is listed as limited with an estimated 25-week lead time, which makes forward purchasing and approved alternates worth considering. RoHS compliance information is not available in the provided specifications, so environmental compliance should be verified directly through the official datasheet, manufacturer declarations, or distributor documentation before release to regulated markets.