The B2D40120HC1 from BASiC Semiconductor is a Power Diode with Forward Current 20 to 40 A, Forward Voltage 1.36 V, Reverse Current 5 to 300 uA, Reverse Voltage 1200 V, Repetitive Peak Reverse Voltage 1200 V. Tags: Surface Mount. More details for B2D40120HC1 can be seen below.