The MMSZ5251B-7-F is a Zener diode manufactured by Vishay Semiconductors. It is a surface-mount, SOD-123 package device with a voltage of 22V and a power dissipation of 500mW. The diode has a Zener voltage range of 20.9V to 23.1V with a tolerance of ±5%. It is designed for use in voltage regulation, surge protection, and voltage reference applications. The MMSZ5251B-7-F has low leakage current and a fast response time, making it ideal for circuit protection and voltage clamping. It is RoHS compliant and is available in tape and reel packaging for automated assembly processes. This Zener diode offers reliable performance and high-quality electrical characteristics, making it a popular choice for various electronic applications