The BZT52B43JS-TP from Micro Commercial Components is a Power Diode with Forward Current 0.01 A, Forward Voltage 0.9 V, Reverse Current 0.045 uA, Reverse Voltage 30.1 V, Repetitive Peak Reverse Voltage 30.1 V. Tags: Surface Mount. More details for BZT52B43JS-TP can be seen below.