The BYS12-90 from Vishay is a Power Diode with Forward Current 1.5 A, Forward Voltage 0.36 to 0.75 V, Reverse Current 0.1 to 1 mA, Repetitive Peak Reverse Voltage 90 V, Non-Repetitive Peak Forward Current 30 to 40 A. Tags: Surface Mount. More details for BYS12-90 can be seen below.