The BZX584B4V7 from Micro Commercial Components is a Zener Diode with Zener Voltage 4.61 to 4.79 V, Zener Current 5 mA, Voltage Forward 0.9 V, Current 1 mA, Current Reverse Reverse Leakage Current:- 3 uA. More details for BZX584B4V7 can be seen below.