Board-to-Board Mezzanine Connector for Tight Z-Height Budgets
The Hirose DF40HC(3.5)-60DS-0.4V(51) is a 60-position receptacle from the DF40 series, designed for parallel board stacking with a fixed mated height of 3.5mm. The 0.40mm pitch and dual-row layout pack 60 signal contacts into a compact footprint, making this part a fit for space-constrained mezzanine interconnects in portable electronics, camera modules, and handheld devices.
Stacking Height and Footprint — What the Pitch Means for Board Layout
The 0.40mm pitch requires careful routing: trace widths and via diameters must shrink to escape the inner rows, and a microvia-capable PCB stack-up is recommended for the inner 30 positions.
Within the DF40HC(3.5) sub-family — same 3.5mm stack height — the 60-position variant sits between the 50-position DF40HC(3.5)-50DS-0.4V(51) and the 80-position DF40HC(3.5)-80DS-0.4V(51). All three share the identical 0.40mm pitch, dual-row layout, and gold contact finish. The choice is purely a function of the signal count on the BOM: 50, 60, or 80 lines. No footprint or keep-out zone difference beyond the position count itself.