The KDZ4.3V-RTK/P is a Zener Diode manufactured by KEC. It is a SOD-323 RoHS complaint device that is designed for voltage regulation and clamping applications. It features a small, thin case measuring 2.65mm x 1.75mm, making it suitable for low-profile applications. The breakdown voltage is 4.3V, with a power rating of 200mW, making it an ideal device for a variety of electronic systems. It has a low forward-voltage drop of 0.6V and a fast response time of 35ns, making it ideal for a wide range of transient protection needs. It has a wide operating temperature range of -55°C to +150°C, making it perfect for a wide range of applications. It also has a very low leakage current of 1nA at 5V, making it suitable for low power applications.