140-Position, 0.60mm Pitch Mezzanine Receptacle for Tight Board Stacks
With a 0.024" (0.60mm) pitch and two rows of gold-plated center strip contacts, it mates with the matching FX8 header to create a reliable interconnect for dense PCB assemblies. The 0.089" (2.26mm) height above board and supported mated stacking heights of 3mm and 4mm make it suited for compact electronics where vertical space is tight — think portable devices, telecom line cards, or embedded computing modules.
What the 0.60mm Pitch and 140 Positions Mean for Board Layout
At 0.60mm pitch, the trace routing between pads is the tightest constraint — expect 0.3mm trace/space minimum on the inner layers to escape all 140 positions. The two-row layout keeps the connector width manageable, but the 70 contacts per row demand a careful fan-out strategy, especially if you're running differential pairs.
Stacking Height Compatibility — 3mm and 4mm Mated Options
The FX8-140S-SV(22) supports mated stacking heights of 3mm and 4mm. That means you pair it with the corresponding FX8 header of the same height — the header's standoff determines the final board-to-board gap. For a 3mm stack, the total z-height from bottom PCB to top PCB is 3mm; at 4mm, you get more clearance for component keep-outs on the underside of the top board. Confirm the header part number matches your target stack height before ordering.
Surface Mount Termination and Packaging Options
This receptacle is surface mount — no through-hole tails, so it reflows on the same side as other SMD components.