The KE12DJ40DT47 from CALY Technologies is a Power Diode with Forward Current 20 to 70 A, Forward Voltage 1.5 to 2.1 V, Reverse Current 4 to 800 uA, Reverse Voltage 1200 V, Repetitive Peak Reverse Voltage 1200 V. Tags: Through Hole. More details for KE12DJ40DT47 can be seen below.