The 1SMB5952BT3G from onsemi is a Power Diode with Forward Current 0.0029 A, Forward Voltage 123.5 to 136.5 V, Reverse Current 1 uA, Reverse Voltage 98.8 V, Repetitive Peak Reverse Voltage 98.8 V. Tags: Surface Mount. More details for 1SMB5952BT3G can be seen below.