DF37SB-30DS-0.4V(51) from Hirose Electric Co Ltd is a fine-pitch board-to-board mezzanine receptacle designed for compact electronic assemblies where board spacing, reliable interconnect performance, and assembly efficiency are critical. As a 30-position, 0.40 mm pitch surface-mount connector with center strip contacts, it is well suited for portable devices, industrial control modules, embedded computing boards, and space-constrained communication equipment. Features such as gold contact finish and solder retention support dependable mating and automated production workflows. Within the Connectors, Interconnects > Rectangular - Board to Board Connectors - Arrays, Edge Type, Mezzanine category, this part is positioned for dense, low-profile designs that need stable board stacking in limited space. Lifecycle status is currently listed as information not available, so engineers should verify ongoing manufacturer support before locking it into long-term programs. RoHS compliance information is also not explicitly provided in the supplied data; procurement teams should confirm RoHS and related environmental documentation through official Hirose sources before release.