Board-to-Board Signal Header at 1.27mm Pitch
The 20021221-00110C8LF: It carries 1A per contact at 125VAC — the 1.27mm pitch and 30µ" gold GXT™ on the mating face keep contact resistance stable over repeated mating cycles, suited for production equipment or field-serviceable assemblies where the connector is cycled more than a few times.
The header body has 10 physical positions but only 9 pins are loaded — one position is intentionally vacant. This is a common keying or selective-loading practice: the missing pin prevents the mating receptacle from being inserted in the wrong orientation or into the wrong header variant. Confirm your mating half is also a 9-circuit receptacle with the corresponding vacant position, or that your board layout accounts for the missing pin.
Surface-Mount Termination with Pick-and-Place Compatibility
The insulation height of 0.220" (5.60mm) and mating pin length of 0.120" (3.05mm) set the mated stack height; check your board-to-board spacing against these dimensions.