641966-1 is a Universal MATE-N-LOK vertical pin header designed for wire-to-board interconnect applications. This connector features 3 circuits with a standard tail polarized configuration and pre-tin plating finish. The header has a dimension A of 0.800 inches (20.32 mm) and is rated UL94V-0 for flammability. It mates with Universal MATE-N-LOK II plug housing part number 770018-1 or Universal MATE-N-LOK plug housing 350766-1 using socket contacts. This connector is suitable for power circuit applications in various electronic devices.