The BZT52C5V1LP from Micro Commercial Components is a Zener Diode with Zener Voltage 4.8 to 5.4 V, Zener Current 1 mA, Voltage Forward 0.9 V, Current 5 mA, Current Reverse Reverse Leakage Current:- 2 uA. More details for BZT52C5V1LP can be seen below.