DF37NC-34DS-0.4V(53) from Hirose Electric Co Ltd is a fine-pitch rectangular board-to-board receptacle connector designed for compact electronic assemblies where space, profile, and interconnect reliability are critical. With 34 positions, 0.40 mm pitch, dual-row construction, and SMT mounting, it is well suited for portable devices, display modules, industrial control boards, embedded computing platforms, and other high-density PCB designs. Engineers typically choose this series when they need dependable signal interconnection in low-profile stacked board configurations. Based on the provided data, the part is listed as Active, which supports its use in ongoing production and maintenance procurement, although lifecycle status should still be confirmed through current manufacturer documentation for long-term programs. RoHS compliance information is not explicitly provided in the supplied specifications, so compliance status should be treated as information not available pending official datasheet, declaration, or manufacturer confirmation. For sourcing teams, the stated sufficient supply status and reel packaging support volume procurement and SMT assembly workflows.