The BZX584B18 from Micro Commercial Components is a Zener Diode with Zener Voltage 17.64 to 18.36 V, Zener Current 5 mA, Voltage Forward 0.9 V, Current 1 mA, Current Reverse Reverse Leakage Current:- 0.1 uA. More details for BZX584B18 can be seen below.
