The 1SMA5945BT3G from onsemi is a Power Diode with Forward Current 0.0055 A, Forward Voltage 64.6 to 71.4 V, Reverse Current 0.5 uA, Reverse Voltage 51.7 V, Repetitive Peak Reverse Voltage 51.7 V. Tags: Surface Mount. More details for 1SMA5945BT3G can be seen below.