Amphenol Quadrax Contacts are designed for high-performance applications requiring high data transfer rates and excellent EMI compatibility. The contacts feature four strategically spaced inner contacts forming two 100 or 150 Ohm matched impedance differential pairs, and a rugged outer contact for durability. They are typically used in MIL-DTL-38999 Series III connectors and are available in size 8 crimp termination style. Modification of the connector is required to accommodate the keyed contacts. These contacts are ideal for Gigabit Ethernet and other high-speed data transmission applications.