The IDW40G120C5B from Infineon Technologies is a Power Diode with Forward Current 40 A, Forward Voltage 1.4 V, Reverse Current 0.012 to 1.7 mA, Repetitive Peak Reverse Voltage 1200 V, Non-Repetitive Peak Forward Current 290 A. Tags: Through Hole. More details for IDW40G120C5B can be seen below.