Fine Mate 80-Position Mezzanine Receptacle — 0.50 mm Pitch, Obsolete
The TE Connectivity 8-2041251-0 is an 80-position receptacle from the Fine Mate series, designed for board-to-board mezzanine stacking. It uses a dual-row, 0.020" (0.50mm) pitch layout with center strip contacts, all gold-plated to 10.0µin (0.25µm). The connector is surface-mount and includes a board guide for alignment during pick-and-place, plus solder retention pads to anchor the part through reflow and resist shear forces from the mated header. It supports two mated stacking heights — 3mm and 5mm — by pairing with the corresponding Fine Mate header. The 80 circuits at this pitch suit high-density signal routing where board real estate is tight, such as in compact handheld devices or module stacking.
What the 0.50 mm Pitch and 80 Positions Mean for Your Board
The 0.50 mm pitch is the tightest common mezzanine pitch; it drives the board layout density and rules out hand-soldering — this is a reflow-only part. The 80 positions in a dual-row configuration give a narrow overall width, which helps with routing channels in a dense mezzanine stack. The board guide and solder retention features are practical for automated assembly — the guide helps the nozzle place the part accurately, and the retention pads keep the connector from lifting during reflow or under cable strain from the mated header.