The TE Connectivity 1-2199070-4 is a 24-position member of the Fine Pitch Hermaphroditic (FPH) series — a self-mating, non-gendered connector designed for board-to-board stacking where the same part number serves both halves of the interconnect. Its 0.020" (0.50 mm) pitch and dual-row layout pack 24 circuits into a compact SMT footprint, with a fixed 4 mm mated stacking height that sets the board-to-board spacing in a mezzanine or parallel-stack assembly. Gold contact finish on both mating surfaces supports repeated connect-disconnect cycles without corrosion, making it a candidate for applications that require field service or rework access.
That drives the PCB routing density — you need fine-line traces and via-in-pad capability to escape the inner rows. It also limits per-contact current by the trace width the board can support, not by the contact itself. For a 24-circuit dual-row connector at this pitch, the practical current per circuit is below 1 A in most designs; the connector is a signal-density solution, not a power interconnect.
Self-Mating Design Cuts Inventory Complexity
Because the 1-2199070-4 is hermaphroditic — self-mating and non-gendered — any two identical parts mate together. That halves the number of line items on the BOM for a board-stacking pair: one order code covers both the top and bottom board.