SM6T6V8A-E3/5B Circuit Protection

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A TVS–Diodes is a very important element in the area of electronics. It is mainly used as an electrical surge protection device. The SM6T6V8A-E3/5B is one such device. It is commonly used for protecting sensitive electronic equipment from sudden voltage spikes that occur in power, audio/video, and automotive systems. In this article, we will discuss the application field and working principle of the SM6T6V8A-E3/5B.

Application Field

The SM6T6V8A-E3/5B is an excellent choice for a wide variety of applications, including:

• USB and IEEE1394 computer ports
• General consumer electronics, audio/video equipment, and 60VAC/VDC power systems
• Avionics, medical devices, household appliances, and automotive systems

The device is designed for over voltage and transient voltages protection. Its small size and low stray inductance make it ideal for a variety of applications.

Working Principle

The SM6T6V8A-E3/5B is a unidirectional device. It acts like a high power gate that opens up when a specific voltage is reached. The device is made up of two components: a silicon deposition layer and a zinc oxide layer. When a surge or transient voltage is applied to the device, the voltage causes the zinc oxide layer to break down and absorb the excess energy. This dissipates the voltage and prevents it from reaching the protected equipment.

The device features a bidirectional design, which makes it suitable for use in protecting both positive and negative voltages. It also has low capacitance and low leakage current due to its advanced engineering design.

The device is designed with two different clamping voltage levels, the lower one being 6.8V and the higher one being 8V. When the circuit is under normal operation conditions, the device is in an “off” state, meaning it does not allow any current to flow. As soon as the applied voltage reaches either one of the clamping voltage levels, the device triggers and switches on, allowing the current to flow.

As soon as the voltage returns to the normal level, the device switches off again and the protection mode is enabled. This process happens very quickly to minimize the amount of energy picked up by the protected components.

Conclusion

In conclusion, the SM6T6V8A-E3/5B is an effective surge protection device for a variety of applications. It is designed to protect sensitive equipment from voltage spikes and surges, while maintaining low stray inductance and low capacitance. The device is also cost-effective and easy to install in circuits and systems.

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