What this connector is
The Amphenol FCI 87900-172HLF is the 72-circuit member of the BERGSTIK II dual-row header series — a 2.54 mm pitch board-to-board interconnect with through-hole solder tails and push-pull fastening. All 72 positions are fully loaded with square male pins, each clad in 30.0µin of gold over the mating face. Rated 5 A per circuit at 110 V, the phosphor bronze contact arm carries the current within the derating ceiling of the housing material.
What the ratings mean for your fit
The 72-position dual-row count is the primary BOM parameter — verify your board footprint accommodates 2 rows at 0.100-inch row spacing before committing. The 5 A per-circuit rating governs power or mixed-signal distribution within a board-stack.
Where it goes and how it sits in the series
Board-to-board headers at 0.100-inch pitch are the workhorse of industrial control, instrumentation, and legacy backplane interconnects — the 72-position count places this at the larger end of the BERGSTIK II series, typically used where a full 72-conductor signal bus or mixed-signal distribution runs between parallel boards in a mid-stack assembly. The 0.100-inch insulation height matches standard PCB stack-ups without stub protrusion.
Sourcing and lifecycle
Listed Active — the 87900-172HLF is in normal production and sourced to order against the BOM quantity. No official successor or cross-reference is listed for this exact position count; confirm the 72-circuit requirement matches the board layout before committing. Bulk packaging is standard for this series.