DF37B-16DP-0.4V(53) from Hirose Electric Co Ltd is a fine-pitch rectangular connector header designed for compact board-to-board interconnect applications where space, profile, and assembly stability matter. With 16 positions, a 0.40 mm pitch, dual-row layout, SMT mounting, and solder retention features, it fits densely packed portable, consumer, industrial, and embedded electronic designs. Engineers typically consider this series for slim handheld devices, display modules, compact control boards, and other products that need reliable low-profile stacking. The listed product status is Active, which is positive for ongoing designs, although the overall lifecycle status provided here remains unknown and should be confirmed against current manufacturer documentation. Supply and demand are marked Limited, so sourcing teams should plan procurement carefully for sustained production. RoHS compliance information is not available in the provided data, so environmental compliance should be verified directly with Hirose datasheets, declarations, or authorized channel documentation before release to regulated markets.