0.40mm Pitch Mezzanine Plug, 34 Circuits
The Hirose DF40C-34DP-0.4V(58) is a 34-position plug with outer shroud contacts from the DF40 series, designed for board-to-board mezzanine stacking at a 0.016" (0.40mm) pitch. The gold-plated contacts and dual-row layout support high-density signal routing in compact consumer and industrial electronics.
Stack Height Range Covers 1.5mm to 4mm
This plug mates with the corresponding DF40C receptacle to achieve stacking heights of 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, or 4mm. That range covers most low-profile mezzanine applications — from ultra-thin wearables at the 1.5mm end to modules requiring more component clearance at 4mm. The 0.045" (1.14mm) height above board keeps the mated pair within tight z-height budgets.
Position Count and Pitch Define the Footprint
At 34 positions on a 0.40mm pitch, this plug matches a 34-conductor flex circuit or a 34-signal board interconnect. The 2-row arrangement keeps the connector width manageable — roughly 7mm across the body — which matters when routing traces out of a dense BGA area. Compared to the 30-position DF40C-30DP-0.4V(51) or the 40-position DF40C-40DP-0.4V(51), the 34-position variant fills the gap for builds that need exactly 34 signals without wasting board space on unused contacts.