:The 1SMA4728AG is a Zener diode manufactured by Shikues that conforms to the SMA standard. It is RoHS-compliant and offers increased reliability and life expectancy due to its superior construction and materials. It features a cutting-edge mesa construction and has an ultra-fast response time, making it well-suited for high-frequency applications. Additionally, it improves power handling and can be used to protect sensitive electronics, as well as in a variety of antenna and RF applications.