The SZ1SMB5953BT3G from onsemi is a Power Diode with Forward Current 0.0025 A, Forward Voltage 142.5 to 157.5 V, Reverse Current 1 uA, Reverse Voltage 114 V, Repetitive Peak Reverse Voltage 114 V. Tags: Surface Mount. More details for SZ1SMB5953BT3G can be seen below.