The Amphenol BERGSTIK II 87052-434HLF is a 34-position, dual-row, unshrouded male pin header on a standard 0.100" (2.54 mm) pitch — the workhorse footprint for board-to-board interconnect in industrial and telecom equipment. The tin-plated mating surface (100.0 µin / 2.54 µm) and phosphor bronze contacts are rated for 5 A per circuit at 110 V, which covers signal-level duty and moderate power distribution within a single backplane or daughtercard.
The 0.100" (2.54 mm) pitch and 0.100" (2.54 mm) row spacing are the de facto standard for prototyping and legacy bus architectures — your board footprint is a simple 0.100" grid, which keeps routing straightforward on a two-layer PCB. The overall contact length of 0.990" (25.15 mm) and a mating length of 0.770" (19.56 mm) mean the header stands tall enough to reach a receptacle in a mid-plane stack-up.
The BERGSTIK II series is a broad family; the 87052 base number covers dual-row, unshrouded headers in various pin counts and plating options.