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BYV29-500.127 is a High Voltage Rectifier Diode made by WeEn Semiconductor. It is part of the BYV29-500 series of high voltage rectifier diodes, which are a family of high voltage, low forward voltage drop rectifiers in a TO-247AC package. This diode has a reverse voltage of 500V and a peak forward current of 127A. It has a maximum forward voltage of 1.3V at 127A forward current.