The Hirose FX8-100P-SV1(92) is a 100-position, 0.024" (0.60mm) pitch surface-mount header from the FunctionMax™ FX8 series. It carries outer shroud contacts in two rows and stands 0.152" (3.85mm) above the board, designed for a 4mm mated stack height with the matching FX8 receptacle. This is a mezzanine board-to-board interconnect for parallel PCB stacking inside compact electronics — think handheld instruments, portable medical gear, or telecom line cards where every millimeter of z-height is budgeted.
The 3.85mm board height and 4mm mated stack height mean the header sits slightly below the receptacle body — the gap between the two PCBs after mating is 4mm, with the header's 0.15mm recess providing clearance for the receptacle's shroud. All contacts are gold-plated, which matters for the repeated mating cycles typical in field-serviceable equipment where boards get swapped without degrading the signal path.
The FX8-100P-SV1(92) shares the same 100 positions and 0.60mm pitch as the FX8-100P-SV(92) (0.112" / 2.85mm board height) and the FX8-100P-SV(93) (0.096" / 2.45mm board height). All three are gold-plated, active, and RoHS compliant. The decision between them is purely the mated stack height: the SV1(92) at 3.85mm gives a 4mm stack, the SV(92) gives 3mm, and the SV(93) gives 2.5mm. Pick the one that matches your PCB-to-PCB gap and your enclosure's z-height allowance.