10-Position Dual-Row Socket — 0.100" Pitch, 15µin Gold
The 71991-805LF: The mating contacts are finished with 15µinch (0.38µm) gold over phosphor bronze — enough for reliable signal connections in moderate-cycle industrial or telecom applications. The solder tails are tin-plated (78.7µinch / 2.00µm) for a clean, lead-free solder joint. Mated stack height is fixed at 11.04mm, which sets the board-to-board clearance and enclosure z-height budget.
Board-to-Board Stacking with Fixed 11.04mm Height
As a bottom or top entry receptacle, this part can be mounted on either side of the PCB, though the through-hole solder termination (0.118" / 3.00mm post length) is designed for a standard plated-through-hole board. The insulation height of 0.275" (6.99mm) provides clearance for routing traces under the connector body. Applications listed include automotive, general purpose, industrial, and telecommunications — the 15µinch gold finish supports these environments where moderate humidity or temperature cycling is present, though the 30µinch gold variant (71991-305LF) is better suited for higher mating-cycle or corrosive conditions.
Selection Note: 15µinch vs 30µinch Gold
The 71991-805LF uses 15µinch gold on the mating contacts. For applications requiring higher mating cycle life or better corrosion resistance, the 71991-305LF (10-position, 30µinch gold) and 71991-308LF (16-position, 30µinch gold) are direct pin-compatible alternatives within the same Dubox series. The 71991-808LF offers 16 positions with the same 15µinch gold finish, useful when the BOM calls for more I/O in the same footprint pitch.