0.40 mm pitch, 40 positions, 1.14 mm stack height
The DF40TC-40DP-0.4V(51): Hirose DF40T series header with outer shroud contacts, 40 circuits in a dual-row 0.40 mm pitch layout. Mated stack height is 0.045" (1.14 mm) above the board — this sets the z-height between parallel PCBs for mezzanine card spacing. Gold-plated contacts (1.97 µin) resist fretting corrosion over repeated mating cycles, suited for field-serviceable assemblies where reconnect duty is moderate. Pick-and-place compatible with solder retention features for automated assembly and reflow stability.
Mating receptacle and stack height
Mates with the DF40T series receptacle. The 0.045" (1.14 mm) height above board defines the mated stack height — confirm the opposite board's clearance before layout.