The SZ1SMB5940BT3G from onsemi is a Power Diode with Forward Current 0.0087 A, Forward Voltage 40.85 to 45.15 V, Reverse Current 1 uA, Reverse Voltage 32.7 V, Repetitive Peak Reverse Voltage 32.7 V. Tags: Surface Mount. More details for SZ1SMB5940BT3G can be seen below.