DF37NB-10DS-0.4V(53) from Hirose Electric Co Ltd is a fine-pitch board-to-board receptacle connector used in compact electronic assemblies where space, height, and signal density matter. With a 0.40 mm pitch, 10 positions, dual-row layout, SMT mounting, and low mated stacking height, it is well suited for portable devices, industrial control modules, embedded boards, display interfaces, and other miniaturized interconnect designs. Engineers typically choose this DF37 series part when they need reliable mezzanine-style connection performance, gold-finished contacts, and solder retention features for automated assembly. From a sourcing perspective, it is supplied in tape and reel packaging for volume production. The current lifecycle status is listed as unknown, so buyers should confirm ongoing manufacturer support before locking it into long-term programs. Formal RoHS status is not explicitly provided in the supplied data, so compliance should be treated as information not available until verified through Hirose documentation or an authorized supplier compliance record.