SMDB12E3/TR13 Circuit Protection

TVS (Transient Voltage Suppressor) diodes are electrical devices designed to protect electrical circuits against electrical over-voltage conditions that can damage or destroy them. Such over-voltage events can be caused by lightning strikes, electrical surges, and other electrical pulse events. The SMDB12E3/TR13 is a high-performance, discrete uni-directional TVS Diode in a small SMA package that offers improved performance and efficiency in protecting sensitive electronic components and systems.

The SMDB12E3/TR13 is a 12V, 2000W device that features Peak Pulse Power Dissipation (PPPD) rating upto 400 Watts for low capacitance devices. It has a fast clamping response time of 10 nS, making it ideal for protecting against high energy transients. The device is rated for 400 Watts Peak Pulse Power (PPP) and 40 Amps Peak Pulse Current. The maximum operating junction temperature is 150 Degrees Celsius. This low-capacitance diode with fast clamping response time is suitable for protecting sensitive electronic components in automotive, communications, medical, industrial, and consumer applications.

The SMDB12E3/TR13 is designed to protect electronic circuits from over-voltage transients by providing a controlled clamping of both positive and negative voltage transients. When an over-voltage transient event occurs, the diode will reduce the over-voltage to a level that the protected circuits can withstand. The clamping voltage is determined by the avalanche breakdown voltage of the diode, which is generally specified as the maximum reverse voltage rating.

The working principle of the SMDB12E3/TR13 is based on the junction avalanche breakdown phenomenon. It utilizes a reverse-biased PN junction to limit the reverse voltage. When the voltage across the PN junction exceeds a predetermined value, called as the avalanche voltage, the current in the junction begins to increase exponentially. This rapid increase in current is called as an avalanche or breakdown. This avalanche current is limited by the internal resistance of the junction. The resulting voltage across the diode is much lower than the applied voltage, thus protecting the protected circuit.

The SMDB12E3/TR13 is suitable for a variety of applications, ranging from data communication and consumer electronics (e.g., audio/video equipment, personal computers) to automotive (e.g., vehicle electronics), industrial systems (e.g., motor control systems, power tracks) and medical electronics (e.g., patient monitoring equipment). It can also be used to provide power supply protection for sensitive and critical electronic circuits, as well as to protect against short circuits and reverse polarity.

In summary, the SMDB12E3/TR13 is a high performance, reliable, and cost-effective TVS Diode designed to protect sensitive electronic devices from over-voltage transients. It features a fast clamping response time and low capacitance for maximum voltage protection. Its high peak pulse power can protect a wide range of components in automotive, communications, medical, industrial, and consumer applications.