What this connector is
The Amphenol FCI BERGSTIK II 87185-124HLF is a 24-circuit single-row unshrouded male pin header in the 0.100-inch (2.54 mm) pitch BERGSTIK II family, designed for board-to-board interconnects in through-hole assembly. The 0.100-inch grid matches standard 0.100-inch pitch receptacles and is the baseline footprint for legacy digital and industrial control cards — it mates with the matching BERGSTIK II female header or IDC receptacle and mounts directly to the PCB without a locking clip. The push-pull fastening type relies on header-to-housing friction retention, so this is best suited for applications where the mated pair is not subject to continuous vibration or pull-off force — a board-to-board daughter-card in a fixed chassis slot is the natural fit.
Key ratings and what they mean
Rated 5 A per contact at 110 V — that combination places this squarely in low-power signal and control bus territory, not power distribution. The contact material is phosphor bronze with the mating face gold-plated at 30.0 µin (0.76 µm), which gives reliable mates through multiple connection cycles without the oxide-fretting risk of tin-plated alternatives. All 24 positions are loaded, so the full 24 circuits are available from the first unit. The insulation height of 0.100 inches (2.54 mm) is the mated stack height contribution on the board side — check your board-to-board stack-up to confirm z-height budget accommodates this. UL94 V-0 flammability rating covers the housing material in enclosed equipment.