The 1SMA5917BT3G from onsemi is a Power Diode with Forward Current 0.0798 A, Forward Voltage 4.46 to 4.94 V, Reverse Current 2.5 uA, Reverse Voltage 1.5 V, Repetitive Peak Reverse Voltage 1.5 V. Tags: Surface Mount. More details for 1SMA5917BT3G can be seen below.