MUR120 SWITCHMODE™ Power Rectifiers onsemi MUR120 SWITCHMODE™ power rectifiers are designed for use in switching power supplies and inverters and as free wheeling diodes. onsemi MUR120 SWITCHMODE power rectifiers feature ultrafast 25, 50, and 75 nanosecond recovery times as well as low forward voltage, low leakage current, and reverse voltage to 600 V.