The TE Connectivity 1-1658043-1 is a 28-position differential-pair array receptacle from the MICTOR SB series. It uses a 0.031" (0.80mm) pitch across two rows, surface-mounted to the PCB. The connector is designed for high-speed differential signaling — think serial links, backplane mezzanine interconnects, and board-to-board stacking where signal integrity matters more than per-contact current. The 28 positions give you 14 differential pairs, which is the smallest position count in the 1658043 base family; the 84- and 112-position siblings (1-1658043-3 and 1-1658043-4) cover wider buses.
Stacking Heights and Board Layout
This receptacle supports nine mated stacking heights: 5mm, 8mm, 11mm, 14mm, 16mm, 19mm, 22mm, 25mm, and 30mm. That range means one receptacle part number covers multiple board-spacing designs — a layout engineer can pick the matching male header height to hit the exact z-height budget. The board guide feature helps during blind-mate assembly, and the ground bus (plane) provides a low-inductance return path for the differential pairs, which matters for signal quality at high data rates.