Board-to-Board Mezzanine Header for Dense Parallel Stacking
The Hirose FX10B-144P-SV1(91) is a 144-position header from the FunctionMax™ FX10 series, designed as a board-to-board mezzanine interconnect. The connector is specified for a 5mm mated stacking height, which sets the board-to-board spacing in the final assembly.
144 vs 168 Positions — Choosing the Right Circuit Count
The FX10B-144P-SV1(91) shares the same 0.020" (0.50mm) pitch, 5mm mated stack height, and gold-plated contacts as the 168-position FX10A-168P-SV1(91). The difference is 144 circuits against 168 — a 24-position gap that matches the BOM line count. If your design calls for 144 signal paths, this header fits without wasting board area on unused positions; the 168-position version adds an extra row of 24 contacts that must be routed or left floating.