The 3-641213-5 is a 5-position, single-row through-hole header from TE's MTA-100 series, pitched at 0.100" (2.54mm) — the standard spacing that matches the full MTA-100 IDC and crimp receptacle family for wire-to-board harnesses. The male square pins carry a gold mating finish (30.0µin) for reliable repeated connection with the matching female socket, while the tin-plated posts (150.0µin) solder cleanly into the board. The single-wall shroud protects the pins from one side during mating — enough for a guided plug insertion in a controlled enclosure, but not a fully enclosed keyed interface.
What the 1-wall shroud means for your board layout
Unlike a fully shrouded (4-wall) header, the single wall leaves the pin tips exposed on three sides — the mating cable plug must be inserted straight on to avoid bending pins. The insulation height of 0.305" (7.75mm) gives clearance for the mating housing latch. The 0.140" (3.56mm) solder tail length suits standard 1.6mm PCBs; the 0.535" (13.59mm) overall contact length keeps the pin long enough for a positive mate with MTA-100 receptacles.