What this connector is
The Amphenol FCI 87052-154HLF is the 54-circuit member of the BERGSTIK II dual-row board-to-board header series, rated 5 A per contact at 110 V with 30.0 µin gold plating over phosphor bronze contacts. It is an unshrouded through-hole male pin header with 0.100 inch (2.54 mm) pitch, 0.770 inch mated engagement length, and push-pull fastening — the board-to-board style means it is designed to mate with a matching receptacle at a fixed stack height, not to receive a discrete wire directly. All 54 positions are populated, the insulation body is black glass-filled polyester rated UL94 V-0, and the contact post extends 0.120 inch beyond the board surface — the full mated assembly sits at the board-to-board stack height determined by the mating half, not by this header alone.
How the ratings govern the fit
Sourcing and what to confirm before the RFQ
Before issuing the RFQ, confirm the mating half: this is an unshrouded header, which means it requires a matching keyed or polarizing receptacle housing to prevent mis-mating in the field — the male pin header alone does not carry polarity protection. The BERGSTIK II series is a standard Amphenol FCI product with broad second-source coverage, so a commodity buyer looking to reduce single-vendor exposure can cross-check the 87052 base number against compatible headers in the same pitch and row spacing from other manufacturers — but confirm contact grid alignment and mated stack height with each alternate before substituting.