Board-Stacking Receptacle for IEEE 1386 PMC Modules
The TE 5120531-1 is a 64-position receptacle from the Free Height (FH) series, designed to the IEEE 1386 PMC form factor.
What the 1.00mm Pitch and Stacking Heights Mean for Your Board Stack
The 1.00mm pitch is the standard for IEEE 1386 mezzanine connectors — it gives enough routing channels between pads for two traces on a typical PCB layer without necking down to sub-0.1mm lines. The 14mm and 15mm mated stacking heights are the z-height budget from the top of the host board to the underside of the PMC module. If your enclosure has a fixed card cage, the 14mm stack keeps the module lower; the 15mm option adds clearance for taller components on the mezzanine card. Both heights use the same footprint, so you can swap between them by changing the mating header height alone.