Amphenol's Quadrax Contacts are designed for high-performance applications requiring high data transfer rates and low power consumption. The unique design incorporates four strategically spaced inner contacts forming two 100 or 150 Ohm matched impedance differential pairs, ensuring efficient signal transmission. The rugged outer contact provides durability, making these contacts suitable for demanding environments. They are commonly used in Gigabit Ethernet assemblies and other applications requiring reliable, high-speed connectivity. Modification of MIL-DTL-38999 connectors is necessary to accommodate the keyed contacts.