The STTH40200CHR from STMicroelectronics is a Power Diode with Forward Current 20 to 40 A, Forward Voltage 0.66 to 1.25 V, Reverse Current 30 to 300 uA, Repetitive Peak Reverse Voltage 200 V, Non-Repetitive Peak Forward Current 300 A. Tags: Through Hole. More details for STTH40200CHR can be seen below.