The Amphenol FCI (Amphenol FCI) 93939-440HLF is a 40-circuit dual-row BERGSTIK II board-to-board header — the right-angle through-hole member of a long-standing 0.100-inch (2.54 mm) pitch series used throughout industrial automation and control systems. Unshrouded square pins accept the matching BERGSTIK II receptacle housing, with push-pull engagement keeping the pair seated without threaded hardware. Phosphor bronze contacts carry 5 A per circuit at the mating interface, finished in 100 µin (2.54 µm) of tin on both mating and post surfaces — a thickness that supports repeated mate/de-mate cycles in field-service scenarios. Rated 110 V and UL94 V-0, the 93939-440HLF ships in a bag package with all 40 positions populated. The 0.190-inch (4.83 mm) insulation height and right-angle orientation define the board footprint and z-height budget for stacked board assemblies.
Fit and sourcing
The 0.100-inch pitch and 40-position dual-row count are the primary fit checks — match these to the BOM line before committing. The mating half must be the corresponding 40-position BERGSTIK II receptacle housing; unshrouded square pins do not intermate with shrouded or round-pin families. Current rating is per contact — at 5 A the header handles signal and low-power distribution duties comfortably within the tin-plating thermal ceiling.