The Amphenol FCI BERGSTIK II 79821-446HLF is a 46-circuit dual-row board-to-board header operating on the 0.100" (2.54 mm) grid — the standard pitch for daughtercard stacking in industrial control, instrumentation, and telecom backplane applications. Square male pins mate with any standard 0.100" receptacle housing in the series; the push-pull fastening holds the mated pair without tooling, which is useful in test-fixture and field-swap scenarios where the daughtercard must be demated repeatedly. All 46 circuits are populated in this variant, and each contact carries 5 A per circuit at the 100 µin (2.54 µm) tin plating thickness — a heavier tin deposit than the lighter-grade plating on lower-cycle signal headers. The 110 V rating is standard for this pitch class and covers the signal and low-power distribution common in control-plane applications. The housing is UL94 V-0 rated black thermoplastic, and the 0.100" insulation height matches the row spacing, giving a uniform header face for consistent mating and panel layout. The 0.200" (5.08 mm) through-hole tail gives solid solder fill in the plated-through hole without requiring long-tail protrusions that complicate wave-solder board profiles. The 0.430" (10.92 mm) mating length on the pin provides adequate engagement depth for reliable contact normal force, and the 0.730" (18.54 mm) overall contact length accommodates multi-board stacking heights the series is designed for.
Sourcing
The 79821-446HLF carries an Active product status — it is quoted to order against BOM quantity with no official successor on record. The 46-position circuit count is the primary BOM-match parameter; confirm the position count against your board layout before committing.