The 87052-418HLF is an 18-position unshrouded male pin header from Amphenol's BERGSTIK® II series, arranged in two rows on the standard 0.100" (2.54 mm) pitch. It's a through-hole solder-terminated board-to-board interconnect — the kind you see stacking a mezzanine card onto a motherboard or routing a parallel bus across a backplane. The square pins are phosphor bronze with tin plating on both the mating surface and the solder tails, rated for 5 A per contact at 110 V.
What the ratings mean for the fit
The 0.100" pitch mates with standard BergStik receptacles on the same pitch. The 18 positions are fully loaded.
Where it's used
This header is a general-purpose board-to-board interconnect for internal card stacks, backplane headers, and parallel bus wiring inside enclosures. The unshrouded design means it's accessible for probing and rework, but it offers no polarization or keying — the mating receptacle needs to be aligned by the board layout or a separate alignment pin. The UL94 V-0 black housing suits equipment inside an enclosure where flame rating is required. Tin plating keeps the cost low, but it's best suited for applications with limited mating cycles — think a one-time board stack in a production assembly, not a field-serviceable connection that gets unplugged repeatedly.