The SMA3Z5.1A from Rectron Semiconductor is a Power Diode with Forward Current 0.5 A, Forward Voltage 1.2 V, Reverse Current 5.0 uA, Reverse Voltage 1.5 V, Repetitive Peak Reverse Voltage 1.5 V. Tags: Surface Mount. More details for SMA3Z5.1A can be seen below.