What this connector is
The Amphenol 79425-442HLF is a 42-position dual-row unshrouded male header in the BERGSTIK II series, configured for board-to-board interconnects at 0.100" (2.54 mm) pitch. Square pins in a push-pull fastening style accept a matching IDC or friction-lock receptacle; all 42 circuits are populated. Tin plating on both the mating face (100 µin) and the solder tail carries 5 A per circuit at up to 110 V — solid enough for mid-power signal and low-level power distribution across backplanes and daughtercards in industrial and instrumentation applications. The body is black nylon with a UL94 V-0 flammability rating.
Board fit and stack geometry
Through-hole solder tails on 0.100" grid match a standard DIP-compatible footprint — the 3.05 mm tail length and 10.41 mm overall contact length give good wipe and fillet access. The 0.100" insulation height sits flush with the board surface; row spacing matches the 0.100" pitch so the footprint is a clean grid with no staggered offset. Without shrouding, the outer rows rely on the mating receptacle's guidance chamfers — confirm the housing has adequate lead-in for high-vibration board stacks.