DF37C-34DP-0.4V(51) from Hirose Electric Co Ltd is a fine-pitch board-to-board rectangular connector designed for compact electronic assemblies where low profile, reliable mating, and dense signal routing are critical. As part of the DF37 series, this 34-position, 2-row surface-mount header is well suited for handheld devices, industrial control modules, embedded computing boards, compact medical electronics, and other space-constrained designs requiring mezzanine interconnects. Its 0.40 mm pitch and 0.98 mm mated stacking height make it particularly useful in designs that prioritize miniaturization without sacrificing interconnect density. Based on the provided specifications, the product status is Active, which supports use in ongoing production, although lifecycle details should still be confirmed with the manufacturer 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 until verified through official Hirose documentation or supplier compliance records.