The C4D30120D from Wolfspeed is a Power Diode with Forward Current 43 A, Forward Voltage 1.6 to 3 V, Reverse Current 300 uA, Repetitive Peak Reverse Voltage 1200 V, Non-Repetitive Peak Forward Current 85 to 900 A. Tags: Through Hole. More details for C4D30120D can be seen below.