Board-to-Board Mezzanine Header — 36 Positions at 0.50 mm Pitch
The Hirose DF12(4.0)-36DP-0.5V(81) is a 36-circuit, 0.50 mm pitch mezzanine header from the DF12 series, designed for parallel board stacking at a fixed 4 mm mated height.
Lifecycle Status — Obsolete, Sourced to Order
It is not in current factory production, so new-build BOMs should look for a current-production DF12 variant at the same 0.50 mm pitch and 4 mm stack height. No official successor part number is recorded in the lifecycle entry.
At 0.50 mm pitch, the trace escape from the inner rows requires either micro-vias or a tight via-in-pad strategy — this is not a pitch that routes easily on a two-layer board. The board guide eases hand placement during assembly, and the solder retention pads on the sides add shear strength against the lateral force from a cable or mezzanine card during handling.