FFPF10UP20S is an ultrafast recovery diode produced by Fairchild Semiconductor Corporation. It has the following features: ultrafast soft recovery (IF = 1A), <35ns; reverse voltage, 200V; forward voltage (TC = 100°C), <1.1V; enhanced avalanche energy. The product is mainly used in power switching circuits, output rectifiers, freewheeling diodes and switching mode power supplies.