BERGSTIK II 42-Position Unshrouded Header
The Amphenol FCI 79821-142HLF is a 42-position dual-row unshrouded header from the BERGSTIK II series, built on the standard 0.100" (2.54 mm) pitch that matches legacy DIP footprints and common perf-board layouts. The 0.100" row spacing mirrors the pin field of a standard DIP package, so the 42-position layout fits a 2 x 21 grid that suits wide I/O banks, parallel bus interfaces, or control card edge connections.
The 0.100" (2.54 mm) pitch is the key footprint match — it drops directly onto a standard 0.100" grid PCB without custom routing. The 42 positions, all loaded, mean the BOM line count must match exactly; there are no unpopulated positions to adjust for a different circuit count. The 5 A per-circuit rating at 110 V covers signal-level loads and light power distribution, but the real duty limit is the gold plating grade: 30.0 µin (0.76 µm) gold on the mating side is specified for repeated mating cycles, not for high-current bus-bar duty where tin plating on a larger contact surface would be preferred. The through-hole solder termination with a 0.200" (5.08 mm) post length gives a solid mechanical anchor through the board — the overall contact length of 0.730" (18.54 mm) means the pin stands 0.430" (10.92 mm) above the insulator for mating, with enough post length below for a wave-solder fillet.
The BERGSTIK II series is a long-running catalog line, so the 0.100" pitch and 42-position variant should remain available for production builds without an obsolescence watch.