The BZV55C5V1 from Micro Commercial Components is a Zener Diode with Zener Voltage 4.8 to 5.4 V, Zener Current 1 mA, Voltage Forward 1.5 V, Current 5 mA, Current Reverse Reverse Leakage Current:- <0.1 - <2.0 uA. More details for BZV55C5V1 can be seen below.