The 87900-120HLF: Contact finish is gold or Gold GXT at 30.0 µin (0.76 µm) on the mating surface, over phosphor bronze — the thick gold flash is the grade that separates cycling durability from a throwaway signal joint. Voltage rating is 110 V; insulation height is 0.100" (2.54 mm), which sets the stacked-board separation when this header is used as the board-interface half of a mezzanine or right-angle daughter-card assembly. The housing is UL94 V-0 rated black, through-hole solder termination on a 0.120" (3.05 mm) post length — the post sticks through the PCB for wave or hand-solder fixturing. Shrouding is unshrouded and the contact shape is square, which means there is no built-in polarisation key — alignment during mating is a function of the housing or receptacle it is designed to mate with.
BERGSTIK II uses a 0.100" (2.54 mm) dual-row pitch. The 5 A per circuit rating exceeds typical signal-only headers and supports low-level power distribution. The 0.720" (18.29 mm) mating length provides deep pin engagement into the receptacle for a robust mechanical joint under flex or thermal cycling.
This header mates with the matching BERGSTIK II dual-row receptacle housing or any mechanically compatible 2.54 mm pitch IDC socket with sufficient pin depth. The push-pull fastening type means the mated pair relies on contact normal force rather than a positive lock — in a production harness, confirm the receptacle has a positive latch or that board-to-board clamping holds the pair seated. Contact length at mating of 0.720" (18.29 mm) sets the minimum receptacle pin depth requirement.