The TE 3-641190-8 is an 8-position MTA-100 IDC receptacle — a mass-termination connector that presses discrete 22 AWG wire or ribbon cable into insulation-displacement slots, no stripping or crimping required. The 0.100" (2.54mm) pitch matches the standard breadboard and header footprint, so it mates directly with the MTA-100 header family without a board layout change.
The 0.100" pitch means this receptacle drops onto any standard 0.100" header without a footprint mismatch — it's the same spacing used on Arduino shields and proto boards. 22 AWG wire is the target size; the IDC slot is sized for that gauge, so a 20 AWG or 24 AWG wire won't terminate reliably. The gold plating at 15.0µin is the difference between a one-time install and a connector you can unmate and remate a few dozen times without fretting the contact surface. The locking ramp is a positive latch — it clicks when fully seated and won't back out under machine vibration the way a plain friction lock will.
The red housing is a visual key for the MTA-100 family — it's not just cosmetic; the colour helps identify the connector on a crowded harness without reading the part number.