What This Socket Catches and Why It's Specified
The 5050865-8 is a PCB pin socket from TE's Series 4, designed to accept a pin diameter range of 0.034" to 0.041" (0.86mm to 1.04mm). The closed-bottom, no-tail design means it sits flush on the board — no protruding tail to interfere with backplane clearance. Beryllium copper holds its spring force across the full -65°C to 126°C operating range, which matters when the socket lives in a thermal cycling environment like an automotive ECU or an industrial controller.
Fit and Termination Details
Termination is solder — the socket has a flange diameter of 0.089" (2.26mm) and mounts into a 0.072" (1.83mm) hole. The overall length is 0.260" (6.60mm), and the socket depth is 0.247" (6.27mm), leaving 0.013" above the board surface for the solder fillet. It ships in bulk packaging, which is typical for through-hole sockets that get fed into wave solder or selective solder processes.