The 1SMB5954BT3G from onsemi is a Power Diode with Forward Current 0.0023 A, Forward Voltage 152 to 168 V, Reverse Current 1 uA, Reverse Voltage 121.6 V, Repetitive Peak Reverse Voltage 121.6 V. Tags: Surface Mount. More details for 1SMB5954BT3G can be seen below.