SMBJ4743E3/TR13

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The SMBJ4743E3/TR13 is a single Zener diode with a low breakdown voltage specified at 3.3V. This dedicated device offers excellent performance in both its application fields and its working principle.

Application Fields

Zener diodes are primarily used in voltage regulator applications, allowing for isolated and regulated power supply configurations. In addition, Zener diodes are widely used in noise suppression and general protection for electric circuits. The SMBJ4743E3/TR13 finds its uses in these application fields due to its low breakdown voltage of 3.3V.

The diode is widely used in automotive, computer, communication and other electronic industry applications. For example, in automotive, it can be used to regulate the voltage of engines and electric systems, ensuring correct operation of the vehicle. In computers and communication, it can be used for protection against overvoltage or dangerous voltages from power sources.

The SMBJ4743E3/TR13 is available in a variety of packages, offering flexibility for most applications. An example is a 5-pin SMD package, providing an economical solution for tight spaces. Despite its small package size, the diode offers effective voltage regulation and protection, making it an ideal choice in many applications.

Working Principle

The SMBJ4743E3/TR13 is a single Zener diode whose working principle is relatively simple. Under normal conditions, the anode voltage is lower than the cathode voltage, resulting in reverse-bias of the diode. However, if sufficient reverse-bias current is applied to the diode, the junction potential increases and its resistance decreases, resulting in a breakdown voltage.

This device uses a Zener breakdown to regulate voltages. When the reverse-bias voltage exceeds its breakdown voltage, the diode becomes forward-biased, allowing current to pass from the anode to the cathode. At this point, the diode acts as a constant voltage device, allowing for stable voltage regulation over the applied voltage range.

In addition, the SMBJ4743E3/TR13 also offers enhanced thermal protection. The device is designed to enter a second breakdown region if the temperature exceeds a specified value, significantly limiting current flow and protecting the device from thermal damage.

Conclusion

The SMBJ4743E3/TR13 is a single Zener diode offering excellent performance in both the application fields and its working principle. Its low breakdown voltage makes it suitable for stable voltage regulation and noise suppression and general protection applications. In addition, it provides enhanced thermal protection, further improving its performance in many applications.

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