Board-to-Board Mezzanine Plug for Tight Z-Height Budgets
The Hirose DF40JC-60DP-0.4V(53) is a 60-position plug with outer shroud contacts from the DF40 series, designed for parallel board stacking at a fixed 2mm mated height. The plug mates with the matching DF40 series receptacle, such as the DF40JC-60DS-0.4V(53), to form a board-to-board connection with a 2mm stack height. Surface-mount termination and the 0.045" (1.14mm) height above board keep the profile low, suited for portable electronics, camera modules, and handheld devices where the z-height between stacked PCBs is tightly controlled. The gold-plated contacts with 2.00µin (0.051µm) finish provide reliable signal-level connections for repeated mating cycles typical in modular assemblies.
2mm Stack Height and 0.40mm Pitch — What They Mean for Layout
That 0.40mm pitch drives the board footprint: each row of 30 contacts on 0.40mm centers demands precise trace routing between pads, typically with micro-vias or blind vias in the breakout area. The outer shroud contacts provide mechanical alignment and some shielding of the signal pins during mating. At 60 positions across two rows, the connector occupies roughly 12mm of board edge per row. The 0.40mm pitch limits per-contact current to signal levels — this is not a power interconnect.
For BOM planning, the 60-position count and 0.40mm pitch are the critical fit parameters — confirm the mating receptacle and board footprint before committing.