The Hirose DF40HC(4.0)-60DS-0.4V(51) is a 60-position receptacle with center strip contacts from the DF40 series, designed for board-to-board mezzanine stacking at a 4mm mated height. The 0.40mm pitch and 2-row layout pack a high signal count into a compact footprint, typical for mobile devices, handheld electronics, and compact industrial modules where PCB real estate is tight.
Mating and Stacking Height — Getting the Board Spacing Right
That 4mm dimension is the total board-to-board gap once mated, so your PCB stack-up, component height on the underside, and enclosure clearance all need to accommodate it. The 0.40mm pitch demands careful PCB layout — trace routing between pads is tight, and a controlled impedance stack may require narrower traces or microvias depending on signal speed.
Position Count Options Across the DF40 Series
The DF40HC(4.0) family shares the same 0.40mm pitch, 2-row layout, and 4mm stacking height across position counts. The 60-position variant sits between the 40-position (DF40HC(4.0)-40DS-0.4V(70)) and the 80-position (DF40HC(4.0)-80DS-0.4V(51)), with a 90-position option (DF40HC(4.0)-90DS-0.4V(51)) also available.