SD32315TR Circuit Protection

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Transient voltage suppressors (TVSs) are important components for protecting electronic equipment from high-voltage damage. TVSs are widely used in automotive, consumer electronics, and industrial applications. Their wide range of application characteristics, including low capacitance, high power handling capability, and high surge current capability, make them an attractive solution for many challenges in the electronic industry. The SD32315TR is a popular TVS diode.

The SD32315TR is a two-line bidirectional Transient Voltage Suppressor diode designed for high-speed data line (Vcc-Gnd) protection against ESD, EFT, and surge transients. It is designed to provide ESD protection for 1.5 kV, as well as EFT protection for 50 V, and 30 A surge capability. It also features an ultra-low dynamic capacitance of 0.5 pF and an integrated ESD protection triggered at 9kV contact/16kV air.

The SD32315TR is designed to prevent the exposure of sensitive electronic components to transient overvoltage. The diode is triggered when the supply voltage rises above its specified peak voltage level and clamps the voltage to a specified value, suppressing the transient overvoltage. The three main components of the diode are a Zener diode, a power-gain field, and a series resistor.

The integrated Zener diode is used to monitor the instantaneous voltage magnitude and provides residual noise protection. The power-gain field is composed of an avalanche diode and a junction diode, which serve to increase the power-handling capabilities of the diode. The series resistor is used to limit the peak current to a lower value, ensuring safe operation. The structure of the SD32315TR is designed to combine the rapid switching times of a Zener diode and the higher power handling of an avalanche diode.

The SD32315TR can be used to protect a wide range of applications, such as computers, data lines, automotive systems, industrial controllers, and CCTV systems. It is a robust solution for ESD, EFT, and transient protection. Its ultra-low capacitance ensures that the insulation resistance of the protected line is not compromised, while its 30A surge capability and 10kV peak voltage level make it suitable for protecting a wide range of applications.

In summary, the SD32315TR is a robust, high-performance Transient Voltage Suppressor diode designed for fast-switching line protection from ESD, EFT, and surge transients. It is suitable for a wide range of applications and its ultra-low capacitance ensures that the insulation resistance of the protected line is not compromised. Its integrated Zener diode and series resistor limit the peak current, while its power-gain field provides increased power-handling capabilities.

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