DF40GB-70DP-0.4V(51) from Hirose Electric Co Ltd is a fine-pitch rectangular plug connector designed for compact board-to-board interconnect applications where space, signal integrity, and assembly reliability matter. With 70 positions, 0.40 mm pitch, dual-row construction, shielded design, gold contact finish, and SMT mounting, it is well suited for slim portable electronics, industrial control modules, communication equipment, and other high-density PCB designs. Features such as solder retention and outer shroud contacts support stable automated assembly and dependable mating performance in tightly packaged systems. Based on the provided data, this part is listed as Active, which is favorable for current designs, although engineers should still monitor supply planning because lifecycle transitions can change over time. RoHS compliance information is not explicitly provided in the specifications, so compliance status should be treated as information not available pending verification through the official datasheet, manufacturer declaration, or authorized distributor documentation.