.The US1MF with Diodes - Rectifiers - Hyperfast 1kV 1A 1.7V @ 1A 75ns SMAF RoHS manufactured by Microdiode Electronics is a SMAF (surface mount fast recovery) diode rectifier. This device is a hyper-fast, ultra-high voltage diode with a maximum reverse voltage of 1000 volts and a low, 1.7 volt forward voltage drop at 1 ampere of current. It has a fast 75 nanosecond switching speed and can operate at temperatures up to 175°C. The device is also RoHS (Restriction of Hazardous Substances) compliant.