What is the 4-640441-8?
The 0.100" (2.54mm) pitch matches the standard MTA-100 header footprint, and the locking ramp holds the pair together against vibration once mated. The closed-end design blocks debris from entering the back of the connector.
What wire gauge and cable type does it accept?
This IDC receptacle is factory-set for 24 AWG wire — the insulation displacement slot is sized for that gauge. It handles both discrete wires and ribbon cable, so you can run individual conductors or a flat cable bundle through the same connector body. The 24 AWG limitation means 22 AWG or 26 AWG wire will not seat correctly in the IDC slot; stick with the listed gauge for a reliable gas-tight connection.
What is the mating connector?
The 4-640441-8 mates with any standard MTA-100 header of the same pitch and position count — typically a 0.100" (2.54mm) pin header with 18 pins in a single row. No separate terminal crimping is needed on the receptacle side; the IDC termination makes the wire-to-board connection in one press operation.