What this connector is
The Amphenol 87185-132HLF is the 32-circuit member of the BERGSTIK II board-to-board header series — a single-row unshrouded header with square male pins designed for through-hole solder termination on 0.100-inch (2.54 mm) pitch. Phosphor bronze contacts carry 5 A per circuit with 30.0 µin (0.76 µm) gold or Gold GXT plating on the mating surface, rated 110 V. The push-pull fastening type means the header relies on friction and pin engagement for retention rather than a locking latch — fine for permanent board-to-board stacks, less ideal where the assembly sees repeated connect/disconnect in the field. Insulation is UL94 V-0 black thermoplastic.
What the ratings mean for fit
Pitch is standard 0.100 inch on 0.100-inch insulation height. The 32-position single-row footprint is tight horizontally but keeps the z-height down versus a dual-row part. The gold or Gold GXT plating at 30.0 µin is a mid-grade finish — better than flash gold for repeat mating cycles. The square pin shape seats in standard square sockets or IDC insulation displacement slots in matching IDC receptacles; round-pin sockets are a mismatch and will not hold positive contact.
Where it is used
Board-to-board stack and mezzanine interconnects, typically in industrial control cards, power supply board assemblies, and instrumentation where a permanent or semi-permanent header connection is preferred to a mating connector pair. The unshrouded design means it pairs naturally with the matching BERGSTIK II IDC receptacle or a crimp-style receptacle housing in the same series — confirm the housing accepts the 0.095-inch post length and 1.043-inch mating length before specifying the mating half. UL94 V-0 flammability rating makes it suitable for industrial and some elevator-control applications where flame retardance is a procurement requirement.