The MMBZ5255C from Micro Commercial Components is a Zener Diode with Zener Voltage 27.44 to 28.56 V, Zener Current 4.5 to 0.25 mA, Voltage Forward 1.2 V, Current Reverse Leakage Current:- 0.1 uA, Power 300 mW. More details for MMBZ5255C can be seen below.
