The Amphenol FCI 87185-128HLF is a 28-position single-row BERGSTIK II unshrouded header built for board-to-board interconnects at 0.100-inch (2.54 mm) pitch. The push-pull fastening and square male pin profile accept the matching BERGSTIK II receptacle — the unshrouded pin row makes visual alignment straightforward during mating, though without the keying shoulders of a shrouded variant it relies on correct connector orientation in the stack. Phosphor bronze contacts carry 5 A per circuit with gold or Gold GXT plating at 30.0 µin (0.76 µm) thickness on the mating face — the thicker gold grade extends mating cycle life relative to tin-plated alternatives. The housing is black PA (nylon) rated UL94 V-0, and the 110 V rating covers signal and low-power bus duties typical in industrial automation and instrumentation backplanes. Through-hole solder termination with a post length of 0.095 inch (2.41 mm) and overall contact length of 1.238 inches (31.45 mm). The 0.100-inch (2.54 mm) insulation height matches the 0.100-inch pitch for board-to-board stacking applications.
Where it sits in BERGSTIK II
The 28-circuit count makes this a mid-to-high density member of the BERGSTIK II series — single-row, unshrouded, through-hole headers in this family share the same 0.100-inch pitch and 5 A per-circuit rating, so the mating receptacle and any board footprint calculator carry across the series. The 110 V rating and UL94 V-0 housing are consistent with the series spec; the gold or Gold GXT plating option on this variant is the primary differentiator versus tin-plated siblings.