What the 0.35mm Pitch Means for Your Board Layout
The Hirose BM28B0.6-24DS/2-0.35V(53) is a 24-position receptacle with center strip contacts from the BM28 series, designed for board-to-board mezzanine stacking where the z-height budget is tight. The 0.014" (0.35mm) pitch is the tightest constraint on this part — it drives the PCB footprint and forces a fine-line routing strategy between pads. At this pitch, the escape routing between pads typically requires a minimum trace/space of 0.15mm/0.15mm on the inner layers, and the solder mask registration tolerance becomes critical. The 0.024" (0.61mm) height above board and 0.6mm mated stack height confirm this is an ultra-low-profile interconnect for stacked PCB assemblies in compact handheld or wearable devices.
The BM28B0.6-24DS/2-0.35V(53) sits at 24 positions in the BM28 series, between the 20-position BM28B0.6-20DS/2-0.35V(51) and the 30-position BM28B0.6-30DS/2-0.35V(51). The 24-position variant is the middle option, useful when the signal count falls between 20 and 30 lines and the board real estate is fixed by the connector footprint.
It is ROHS3 compliant.