DF40TC-40DS-0.4V(58) — 40-Position 0.4mm Pitch Mezzanine Receptacle
The Hirose DF40TC-40DS-0.4V(58) is a 40-position receptacle from the DF40T series, designed for board-to-board mezzanine stacking at a 1.5mm mated height. The 0.016" (0.40mm) pitch and dual-row layout pack 40 signals into a compact footprint, making this part a fit for dense handheld or portable device PCBs where z-height and board area are both constrained.
0.40mm Pitch and 1.5mm Stack Height
The 0.40mm pitch drives the PCB routing — traces between pads need controlled impedance design rules and a fab capable of fine-line etching. The mated stacking height of 1.5mm (0.057" above board on the receptacle side) sets the z-budget between parallel boards; confirm the mating header's height sums to this total.