What the 78511-208HLF is and where it sits in the BERGSTIK II series
The Amphenol ICC 78511-208HLF is the 8-position single-row member of the BERGSTIK II board-to-board header family — an unshrouded square-pin male header designed for through-hole solder mounting on 0.100 inch (2.54 mm) pitch grids. Phosphor bronze contacts carry 5 A per circuit with gold or Gold GXT plating at 15.0 µin (0.38 µm) on the mating surface. The push-pull fastening type refers to the plug-in insertion and extraction geometry rather than a threaded or latch-clip style — the connector seats by push and releases by pulling, which is typical for unshrouded headers where no polarizing rib restrains mis-mate direction. Operating from -65 to 125 °C with UL94 V-0 rated housing material, this connector is suited for board-stacking and inter-board signal or power pass-through in industrial control, instrumentation, and telecom backplane applications where the board population density and the z-height budget call for a compact single-row footprint.
Board footprint and assembly fit
Through-hole solder termination with 0.120 inch (3.05 mm) post length means the connector lands on standard THT PCB pad stacks — no SMT reflow profile required. The unshrouded pin array allows full visual inspection of the mated interface and is compatible with test probes at any exposed pin. The square pin cross-section seats in matching square socket or crimp-receptacle contacts — confirm the socket housing accepts square rather than round pins before specifying the mating half. UL94 V-0 housing material satisfies the most common board-level fire-retardancy requirement in industrial and commercial equipment enclosures.