The BZX584C11 from Micro Commercial Components is a Zener Diode with Zener Voltage 10.4 to 11.6 V, Zener Current 5 mA, Voltage Forward 0.9 V, Current 1 mA, Current Reverse Reverse Leakage Current:- 0.1 uA. More details for BZX584C11 can be seen below.