The Hirose FX2B-68PA-1.27DSA(71) is a 68-position plug from the FX2 series, built as a vertical through-hole header with a 1.27 mm pitch. The gold-plated contacts (7.87 µin / 0.200 µm) resist corrosion over repeated mating cycles, and the ROHS3 compliance means it ships clean for lead-free assembly lines. This part sits as the full-populated 68-circuit member of the FX2 family, typically specified for internal PCB interconnects in telecom, industrial control, and test equipment where the 1.27 mm pitch saves board real estate without dropping to a fragile 0.5 mm or 0.8 mm pitch.
Key Ratings and Fit
The 68 positions at 1.27 mm pitch define the board footprint — each row carries 34 contacts, and the through-hole solder tails need a matching plated through-hole pattern. The gold finish at 7.87 µin handles moderate mating cycles (typically 50 to 200 cycles depending on the housing design), so it holds up in field-service swaps without contact fretting. The center strip contact style means the mating half is a receptacle with a matching slot — not a standard shrouded header — so confirm the mating part is an FX2 series receptacle, not a generic 1.27 mm IDC socket.
It is ROHS3 compliant, so it meets current EU substance restrictions for lead-free soldering.