The 1SMA5942BT3G from onsemi is a Power Diode with Forward Current 0.0073 A, Forward Voltage 48.45 to 53.55 V, Reverse Current 0.5 uA, Reverse Voltage 38.8 V, Repetitive Peak Reverse Voltage 38.8 V. Tags: Surface Mount. More details for 1SMA5942BT3G can be seen below.