The Amphenol FCI 79821-446HLF is a 46-position dual-row unshrouded header from the BERGSTIK II series, built on the standard 0.100" (2.54 mm) pitch grid. It's a through-hole solder part with a push-pull fastening system — no latch, no shroud, just the pins and the housing. The 46 positions are all loaded, giving you a 23-per-side layout on 0.100" row spacing. This is a general-purpose board-to-board interconnect for parallel signal or moderate I/O density on a standard grid.
The 46 positions on dual rows means 23 pins per side; the row spacing is also 0.100", so the overall footprint is 46 pins on a 0.100" square grid. The tin-on-tin contact system is fine for a few dozen mate-unmate cycles; if your application needs frequent field service or lives in a corrosive environment, you'd typically step up to gold-plated contacts, but the cost trade-off here is clear. The 0.430" mating length and 0.200" tail length are standard for a 0.062" board thickness with a typical through-hole solder joint.