The C4D40120H from Wolfspeed is a Power Diode with Forward Current 128 A, Forward Voltage 1.5 to 3 V, Reverse Current 500 uA, Repetitive Peak Reverse Voltage 1200 V, Non-Repetitive Peak Forward Current 245 to 247 A. Tags: Through Hole. More details for C4D40120H can be seen below.