The MMSZ4699T1G is a surface mount Zener diode made by ON Semiconductor. It has a voltage rating of 12V and a power dissipation of 500mW. This diode is designed for use in a wide range of applications such as voltage regulation, sensitive circuits protection, and signal clipping. The MMSZ4699T1G has a low reverse leakage current and high reliability due to its advanced design and construction. This diode is RoHS compliant and is available in a SOD-123 package, making it easy to solder onto circuit boards. Overall, the MMSZ4699T1G is a high-performance and reliable Zener diode that is suitable for various electronic applications