The BZT52B22JS from Micro Commercial Components is a Zener Diode with Zener Voltage 21.56 to 22.44 V, Zener Current 1.00 mA, Voltage Forward 0.9 V, Current 5.0 mA, Current Reverse Reverse Leakage Current:- 0.045 uA. More details for BZT52B22JS can be seen below.