SMBJ16AE3/TR13 Circuit Protection

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TVS diodes are an integral part of protecting sensitive electronic equipment from electrical transients coming from sources external to the system. The SMBJ16AE3/TR13 (herein referred to as “SMBJ”) is a common such transient voltage suppressor diode used for such purposes. In this article, we will explore the application field and working principle of this diode.

Firstly, the SMBJ is designed for applications that have voltage ratings of up to 15.5V. As such, it is commonly seen in industrial, automotive, and consumer electronics applications. For industrial purposes, it is widely used in computers, telecommunications, and other sensitive digital and analog equipment. For automotive applications, it is suitable for dashboards, telematics, and other onboard electronic devices. Finally, in consumer electronics, it is commonly used for all sorts of mobile phones, tablets, and other such personal computers.

The SMBJ works on the principle of “avalanche breakdown”, whereby the applied electrical field is strong enough to induce the formation of electron-hole pairs. This creates a breakdown of the PN junction and allows for a large flow of current across it. This current is then absorbed by the intrinsic resistance of the diode, thus providing protection against electrical transients.

The SMBJ diode also has several protection features, such as overvoltage protection, ESD protection, and lead protection. The overvoltage protection is provided by the Zener voltage limiting of the diode, which cuts off any electrical signals that exceed the maximum voltage. The ESD (electrostatic discharge) protection prevents any shock damage to the diode by diverting the static electricity away from the sensitive equipment. Finally, the lead protection prevents any physical damage to the diode by providing a secure connection between the device and its mounting brackets.

Overall, the SMBJ16AE3/TR13 is a versatile diode for protecting sensitive electronic equipment from electrical transients and other potential dangers. With its high operating voltage rating, protection features, and avalanche breakdown technology, it is an ideal choice for industrial, automotive, and consumer electronics applications.

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