The GD30MPS12J from GeneSiC Semiconductor is a Power Diode with Forward Current 30 to 59 A, Forward Voltage 1.5 to 1.9 V, Reverse Current 2 to 20 uA, Reverse Voltage 1200 V, Repetitive Peak Reverse Voltage 1200 V. Tags: Surface Mount. More details for GD30MPS12J can be seen below.