DF40CG(1.5)-48DS-0.4V(51) from Hirose Electric Co Ltd is a fine-pitch rectangular board-to-board receptacle designed for compact electronic assemblies where high contact density and low-profile stacking are important. With 48 positions, 0.40 mm pitch, dual-row layout, and 1.5 mm mated stacking height, it is well suited for portable devices, industrial control modules, embedded computing platforms, communication hardware, and other space-constrained PCB designs. Gold contact finish and solder retention features support stable interconnect performance in SMT production environments. Based on the provided specifications, the part is listed as Active, which is favorable for ongoing designs, although engineers should still confirm long-term availability directly with the manufacturer or authorized channel. RoHS compliance information is not explicitly provided in the supplied data, so compliance status should be treated as information not available pending official manufacturer documentation or datasheet verification. This part is positioned as a reliable high-density interconnect option for modern compact electronics sourcing.