The 1SMA5921BT3G from onsemi is a Power Diode with Forward Current 0.0551 A, Forward Voltage 6.46 to 7.14 V, Reverse Current 2.5 uA, Reverse Voltage 5.2 V, Repetitive Peak Reverse Voltage 5.2 V. Tags: Surface Mount. More details for 1SMA5921BT3G can be seen below.