The STS521033B101AH from Eaton is a Power Diode with Reverse Current 1.0 µA, Reverse Voltage 3.3 V, Temperature operating range -55 to 150 Degree C, Reverse Breakdown Voltage 3.6 V, Total Capacitance 10 to 20 pF. Tags: Surface Mount. More details for STS521033B101AH can be seen below.