The BZX84C18-7-F is a surface mount Zener diode with a voltage rating of 18V and a power rating of 500mW. It is a popular choice for voltage regulation and overvoltage protection in various electronic circuits. It has a reverse leakage current of 1μA, a maximum forward voltage of 900mV, and a zener impedance of 90 ohms. This component is RoHS compliant and is available in a SOT-23 package. It is commonly used in applications such as voltage clamping, voltage reference, and voltage stabilization in various electronic devices