The Amphenol BERGSTIK® II 87052-450HLF is a 50-position, dual-row unshrouded pin header with a 0.100" (2.54 mm) mating pitch — the standard grid spacing that matches a vast installed base of board-to-board receptacles and IDC connectors. This is the all-positions-loaded variant, so the circuit count matches the position count exactly: 50 circuits in two rows, each contact a square male pin of phosphor bronze with a 100.0 µ" (2.54 µm) tin finish on the mating surface and tin on the solder post. The through-hole termination with a 0.120" (3.05 mm) post length suits standard PCB thicknesses, and the 0.100" (2.54 mm) row spacing keeps the routing density predictable.
Within the BERGSTIK® II family, the 50-position 87052-450HLF sits at the higher end of the position range — a dual-row header with all 50 contacts loaded. The footprint, row spacing, and mating receptacle family are identical, so a board layout designed for a lower position count cannot simply drop in the 50-position without adding more plated through-holes. No other functional difference — same 5 A rating, same tin plating, same overall contact length of 0.990" (25.15 mm).
As an unshrouded header, the 87052-450HLF mates with any standard 0.100" (2.54 mm) pitch dual-row receptacle — typically an IDC socket or a crimp-style housing with the matching square-pin contact geometry. For a board-to-board stack, the overall contact length of 0.990" (25.15 mm) with a 0.770" (19.56 mm) mating length gives the designer the mated stack height budget.