The Amphenol FCI 87052-452HLF is a 52-position, dual-row unshrouded male header from the BERGSTIK II series, on the standard 0.100" (2.54 mm) pitch that matches the classic PC/104 and legacy backplane footprint. Tin-plated phosphor bronze contacts carry 5 A per circuit at 110 V, which is typical for signal-level duty on a board-to-board interconnect; the 100.0 µin (2.54 µm) tin plating on the mating surface handles a moderate number of mating cycles in a permanent or semi-permanent install.
Through-hole solder termination with a 0.120" (3.05 mm) post length — the solder tail sits comfortably in a standard 0.062" board and leaves enough protrusion for a reliable fillet. The 0.100" (2.54 mm) row spacing mirrors the pitch, so the 52 positions occupy a 2.6-inch row of holes on 0.100" centers.