What this connector is
The Amphenol FCI 87901-164HLF is a 64-position dual-row unshrouded board-to-board header in the BERGSTIK II series — a long-running 0.100-inch (2.54 mm) pitch family used across industrial automation, instrumentation, and commercial electronics. Through-hole termination with square male pins accepts a matching receptacle; the push-pull fastening holds the mating pair without a locking螺母 or screw. All 64 positions are loaded, and the contacts carry gold or Gold GXT plating at 30 µin (0.76 µm) thickness — above the typical flash grade — giving the 5 A per-circuit rating meaningful cycle life for field-replaceable board assemblies.
What the ratings mean for the fit
At 0.100-inch pitch on a dual-row grid this header lands on the standard 2.54 mm drill/periphery — it cross-boards with any 0.100-inch dual-row header in the same position count, but the BERGSTIK II footprint and 1.040-inch overall contact length are series-specific; confirm the mated stack height your board stack requires before committing. The 5 A per-circuit rating governs power distribution at board level; the 110 V rating sits well below what a 0.100-inch header typically sees and is appropriate for signal/power mixed-use in industrial control. The UL94 V-0 flammability rating covers commercial and industrial panel environments; there is no IP sealing on this unshrouded part — do not deploy it in wash-down or outdoor locations without a protective housing.