DF36-25P-0.4SD(51) from Hirose Electric Co Ltd is a fine-pitch rectangular plug connector designed for compact wire-to-board and miniature interconnect applications where space saving and reliable mating are important. As a free-hanging, in-line connector with 25 positions, 0.40 mm pitch, solder cable termination, and latch holder fastening, it is suited to densely packed portable electronics, compact control assemblies, display modules, and other precision interconnect designs using discrete wire in the 42–46 AWG range. The gold contact finish supports stable signal connection in low-profile, high-density assemblies. From a sourcing perspective, this part is currently associated with limited supply and an unknown lifecycle status, so engineers should assess long-term availability before locking it into new programs. RoHS compliance information is not available in the provided data. Because this component falls under connectors and interconnects commonly used in regulated markets, designers should confirm current RoHS and related material declarations directly with Hirose or authorized documentation.