SMBJ4745CE3/TR13

The SMBJ4745CE3/TR13 is a single Zener diode specially designed and optimized for portable electronics and battery powered applications. It has a reverse voltage of 45 Volts and a total power dissipation of 350mW. With an average forward current of 200mA, it is ideally suited for applications such as portable signal generation, CMOS chip protection, voltage regulation for industrial and consumer electronics, and data protection for general purpose signal protection.

The Zener diode technology used in the SMBJ4745CE3/TR13 is based upon a semiconductor junction that has been designed and produced to exhibit very precise characteristics and operational parameters. This precise control of the junction makes the SMBJ4745CE3/TR13 the ideal choice in a wide variety of applications. It constitutes an ideal stable voltage reference in both digital and analog circuits, and can be used for overvoltage protection, power supply line protection, and with added circuitry for reverse polarity protection. The SMBJ4745CE3/TR13 is also well suited for power distribution in devices such as portable radios, audio amplifiers, and digital instruments.

The working principle of the SMBJ4745CE3/TR13 involves the application of a forward voltage across the junction of the diode which, when in excess of a specified reverse voltage Vh, causes a significant increase in the current flowing through the diode. This increase in current then results in a greatly reduced voltage across the junction, because two factors—significant reduction in voltage drop across the diode and increased in the series resistance. This behavior of the Zener diode allows it to be used as a voltage reference diode, or as a voltage protection device.

The SMBJ4745CE3/TR13 is a very reliable and stable device and has low thermal resistance. This is important in battery powered applications, as the device’s thermal resistance allows it to consume less power than other voltage references. In addition, this device can also be used for reverse-polarity protection, line regulation and power switching circuits. The SMBJ4745CE3/TR13 is extremely versatile and is suitable for a wide range of applications.