The Amphenol 78511-209HLF is the 9-circuit member of the BERGSTIK II single-row pin header series — a through-hole board-to-board interconnect with 0.100" (2.54 mm) pitch and an unshrouded mating interface. Gold-plated phosphor bronze contacts carry 5 A per circuit across the full operating window of -65°C to 125°C, with the 15.0 µin (0.38 µm) plating thickness covering the mating face for repeatable engagement cycles. The 0.100" insulation height and push-pull fastening type position this header for board-stacking or daughter-card retention in industrial control, instrumentation, and backplane applications where the unshrouded profile suits polarized or keyed-mating housings.
Nine positions at 0.100" (2.54 mm) pitch, all loaded — the position count is the only variable to match against the target footprint.
Through-hole solder termination accepts a 0.120" (3.05 mm) post length into the PCB; overall contact length is 0.538" (13.67 mm). The square pin shape fits standard square header footprints — confirm the pad layout matches before committing the BOM line. Mates with the matching BERGSTIK II female receptacle or any 2.54 mm pitch IDC header with compatible pin dimensions. The unshrouded design means keying relies entirely on the housing polarization tower or panel cutout — confirm the mating half carries the correct keying feature before pairing.
Listed Active — no EOL notice on file for this part number. Quoted to order against BOM quantity; confirm current lead time via RFQ before scheduling assembly.