The STS321033U202AH from Eaton is a Power Diode with Reverse Current 1.0 to 5.0 µA, Reverse Voltage 3.3 V, Temperature operating range -55 to 150 Degree C, Reverse Breakdown Voltage 4 V, Total Capacitance 200 to 250 pF. Tags: Surface Mount. More details for STS321033U202AH can be seen below.