The STS321050B331AH from Eaton is a Power Diode with Reverse Current 1.0 µA, Reverse Voltage 5 V, Temperature operating range -55 to 150 Degree C, Reverse Breakdown Voltage 5.5 V, Total Capacitance 80 pF. Tags: Surface Mount. More details for STS321050B331AH can be seen below.