The 1SMA4731A Zener Diode manufactured by Jingdao is a surface-mountable semiconductor device designed for regulating and stabilizing electric current. It is a single, unidirectional device with an insulated cathode, anode, and a junction. This Zener Diode is composed of two parts: a semiconductor circuit and two metal electrodes typically made of aluminum. It has a breakdown voltage of 7V, a power rating of 500mW, and is RoHS compliant. This product is available in a variety of packages, including an SMA option, and is suitable for a range of line protection, voltage regulation, and power switching applications.