SAC36 Circuit Protection

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TVS diodes, also known as Transient Voltage Suppressors, are protective devices that used to protect components and devices from high voltage or current surges. SAC36 is a type of TVS diode that has wide range of applications and working principles.

Applications of SAC36

SAC36 TVS diodes are designed to provide protection against electrical overstress (EOS) in a variety of applications. The device is suitable for AC/DC transients applications such as IGBTs, power lines, and protection of gate drive circuits in motor drives. Its applications also include ESD protection, filtering, and switch mode power supplies. The device is widely used in aerospace, automotive, and telecommunications systems.

The SAC36 TVS diode can also be used for the protection of power supplies in PCs, LCD TVs, and other consumer electronics. It is suitable for protecting sensitive hardware from voltage transients in the form of electrostatic discharges. In addition, SAC36 is commonly used in 5V, 12V, and 24V DC power supplies to prevent damage caused by short circuits and lightning.

Working Principle of SAC36

The SAC36 TVS diode is a unidirectional device that functions like an avalanche diode. It has two regions of operation: a low operating voltage region that conduction current, and a high voltage region that blocks currents. At low voltages, the device is in forward-biased mode and provides a low resistance path for the current to flow. This allows the device to conduct current when the voltage across it is below the breakdown voltage.

However, when the voltage across the SAC36 rises above the breakdown voltage, the device enters reverse breakdown mode. This enables the diode to absorb large amounts of energy, thereby providing overvoltage protection for the power supply. The reverse breakdown voltage of the SAC36 is typically between 5V and 36V.

In addition to providing overvoltage protection, the SAC36 TVS diode also prevents high-frequency AC signals from entering the system. This is due to the capacitive effect of the diode which results in a loss of high frequency AC signals. The capacitive effect of the SAC36 TVS diode also reduces EMI noise and provides enhanced ESD protection.

Conclusion

The SAC36 TVS diode is an effective device for providing overvoltage protection and ESD protection. It is suitable for a wide range of applications such as IGBTs, power lines, gate drive circuits, consumer electronics, and switch mode power supplies. The diode functions like an avalanche diode, and at low voltages it provides a low resistance path for current to flow. When the voltage rises beyond the breakdown voltage, the diode enters reverse breakdown mode and can absorb large amounts of energy to prevent damage to the power supply. The capacitive effect of the diode also helps to reduce EMI noise and provides additional protection against ESD.

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