The Hirose DF12B(4.0)-50DP-0.5V(86) is a 50-position, 0.50mm pitch header from the DF12 series, designed for board-to-board mezzanine stacking at a 4mm mated height. It uses outer shroud contacts that protect the signal pins during mating and guide alignment — a useful feature when the board stack is tight and the connector is out of sight. The dual-row layout with gold-plated contacts (8.00µin thickness) suits signal-level duty where corrosion resistance and reliable contact over repeated mating cycles matter.
SMT Placement and Packaging for the Line
This header is surface-mount only, packaged in Tape & Reel — it feeds directly into a pick-and-place line without a tray changeover. No through-hole variant in this order code, so the board layout must be SMT-only.
Obsolete — Sourcing Strategy for the BOM Line
If the design can tolerate a different stack height or position count, the broader DF12 series includes active variants worth reviewing.
Mating Half and Fit Check
The 50-position count and 0.50mm pitch are non-negotiable for the footprint — verify the receptacle order code matches these dimensions before committing the BOM. The outer shroud contacts are on the header side; the receptacle accepts the blade.