The Hirose DF12(3.0)-10DS-0.5V(86) is a 10-position, 2-row receptacle with center strip contacts from the DF12 series, designed for board-to-board mezzanine stacking at a 3 mm mated height. The 0.087" (2.20 mm) height above board plus the 3 mm mated stacking height sets the gap between parallel PCBs — the receptacle sits on the bottom board, the matching header on the top card, and the pair closes to a 3 mm air gap. Board guides on the housing help align the two halves during assembly, and the solder retention features hold the part flat through reflow.
Obsolete — Sourcing Reality
The DF12(3.0)-10DS-0.5V(86) is listed as Obsolete. It is no longer in regular factory production.
Mating and Stack-Up
The 0.50 mm pitch and 10-position count must match on both halves — a 10-position header with the same 3 mm stack height spec. Surface-mount termination on both sides; the board layout needs the solder pad pattern for the 0.50 mm pitch, two rows, with the center strip contact footprint.