The MSC2X31SDA120J from Microchip Technology is a Power Diode with Forward Current 30 A, Forward Voltage 1.5 to 2.1 V, Reverse Current 9 to 200 uA, Reverse Voltage 1200 V, Repetitive Peak Reverse Voltage 1200 V. Tags: Surface Mount. More details for MSC2X31SDA120J can be seen below.