The SZ1SMA5918BT3G from onsemi is a Power Diode with Forward Current 0.0735 A, Forward Voltage 4.84 to 5.36 V, Reverse Current 2.5 uA, Reverse Voltage 2.0 V, Repetitive Peak Reverse Voltage 2.0 V. Tags: Surface Mount. More details for SZ1SMA5918BT3G can be seen below.