The SZ1SMA5943BT3G from onsemi is a Power Diode with Forward Current 0.0067 A, Forward Voltage 53.2 to 58.8 V, Reverse Current 0.5 uA, Reverse Voltage 42.6 V, Repetitive Peak Reverse Voltage 42.6 V. Tags: Surface Mount. More details for SZ1SMA5943BT3G can be seen below.