DF37C-10DP-0.4V(51) from Hirose Electric Co Ltd is a compact rectangular connector designed for high-density board-to-board interconnection in space-constrained electronic assemblies. With a 0.40 mm pitch, 10 positions, SMT mounting, and low profile geometry, it is well suited for portable devices, compact industrial modules, embedded control boards, and other designs where reliable signal transfer and tight stacking height matter. Engineers typically select parts in this connector class for fine-pitch applications that demand stable mating performance and efficient automated assembly. The supplied status is Active, which supports ongoing design use, while current market availability is described as sufficient. However, lifecycle data beyond active status should still be verified with the manufacturer for long-term programs. RoHS compliance information is not explicitly provided in the supplied specifications, so compliance should be treated as information not available until confirmed through the official datasheet, manufacturer declaration, or distributor compliance documentation.