DF40C(2.0)-80DS-0.4V(51) from Hirose Electric Co Ltd is a fine-pitch 80-position rectangular board-to-board receptacle designed for compact electronic assemblies where high pin density and low profile are critical. With 0.40 mm pitch, dual-row configuration, 2 mm mated stacking height, and SMT mounting, it is well suited for portable devices, embedded control boards, industrial modules, and other space-constrained interconnect designs. Engineers typically select this series for reliable signal routing, small form factor layouts, and established Hirose connector performance in volume production. The provided status shows Active, which is favorable for ongoing designs, although lifecycle verification should still be confirmed through current manufacturer documentation before release to production. RoHS compliance information is not explicitly provided in the available specifications, so the compliance status should be treated as information not available pending datasheet or manufacturer confirmation. For procurement planning, balanced supply-demand status and tape-and-reel packaging support standard manufacturing and assembly workflows.