Amphenol's Quadrax contacts are designed for high-performance applications requiring high data transfer rates and low power consumption. These contacts feature a unique design with four strategically spaced inner contacts forming two 100 or 150 Ohm matched impedance differential pairs, and a rugged outer contact for enhanced durability. They are typically used in MIL-DTL-38999 connectors and require modification to accommodate keyed contacts. The contacts are gold-plated for excellent conductivity and are available in various configurations to suit different cable types and applications, including Ethernet, Gigabit Ethernet, and USB 2.0.