7-position, 0.100" pitch, single-row header with gold mating surface
The 3-641213-7: The single-wall shroud guides the mating receptacle and protects the male pins from bending during blind-mate assembly — a practical advantage over an unshrouded header in a build-to-print harness where the cable half is plugged in by hand on a production line.
Rating and operating envelope
The current rating is listed as varying by wire gauge — in practice, the MTA-100 contact's current limit is set by the attached wire, not the header pin itself. The through-hole termination with a 0.140" (3.56 mm) post length and tin finish on the post side is a standard wave-solder profile fit.