International Rectifier has introduced the IRF6665 DirectFET MOSFET for medium power Class D audio amplifiers. The device parameters are tuned specifically for improved audio performance such as efficiency, total harmonic distortion (THD) and power density. Applications for Class D amplifiers range from battery-powered portable products to high-end professional amplifiers, musical instruments and car and home multimedia systems. Thermal efficiency enables 100W operation into 8 ohms without a heatsink. The DirectFET MOSFET is available immediately. Pricing is US $0.52 each in 10,000-unit quantities.