What This Header Is
The Amphenol FCI 79425-426HLF is the 26-circuit member of the BERGSTIK II series — a dual-row 0.100 inch (2.54 mm) pitch unshrouded header designed for board-to-board stacking. Phosphor bronze contacts with tin plating on both the mating face (100 µin / 2.54 µm) and the solder tail carry 5 A per circuit at 110 V in a through-hole footprint that anchors mechanically to the PCB plane.
What the Ratings Mean for Fit
The 0.100 inch pitch and 26-position dual-row layout define the footprint dimensions — confirm the board clearance and adjacent component routing fit before committing. Insulation height is 0.100 inch (2.54 mm) and the post extends 0.120 inch (3.05 mm) below the board surface — the total contact length of 0.410 inch (10.41 mm) determines how far the pin protrudes into the mating receptacle, which matters for stack-height planning in mezzanine arrangements.
Where It Goes and What It Is Used For
Lifecycle and Sourcing Posture
Listed as Active. The base product number 79425 groups this into a defined family series — BERGSTIK II spans multiple position counts, so a sourcing RFQ should specify the 26-position exact match to avoid an off-cut or a larger-format variant being quoted instead. No official successor or cross-reference exists for this specific order code; confirm the part number against your BOM line before issuing an RFQ.