The EPW4-1200-S020A from Wolfspeed is a Power Diode with Forward Current 20 A, Forward Voltage 1.5 to 2.2 V, Reverse Current 0.035 to 0.2 mA, Reverse Voltage 1200 V, Repetitive Peak Reverse Voltage 1200 V. Tags: Chip. More details for EPW4-1200-S020A can be seen below.