The BZT52B16JS from Micro Commercial Components is a Zener Diode with Zener Voltage 15.68 to 16.32 V, Zener Current 1.00 mA, Voltage Forward 0.9 V, Current 5.0 mA, Current Reverse Reverse Leakage Current:- 0.1 uA. More details for BZT52B16JS can be seen below.