The 3-644042-3: The closed-end feature blocks the last position, so you cannot accidentally push a wire past the contact area on a 3-conductor cable.
IDC Termination and Wire Compatibility
No stripping, no crimping. The 0.100" pitch matches standard rainbow ribbon cable conductor-to-conductor spacing, so watch pin-one alignment at the press fixture every time. The receptacle accepts both discrete wires and ribbon cable, giving you flexibility in harness construction.
