SMDJ20

TVS - Diodes

TVS, or Transient Voltage Suppressors, are diodes that are designed to protect electronics circuits from high voltage surges. They provide a fast, dependable response to protect against electrical overstress events, such as ESD, lightning and other electrical fast transients. In this article, we will discuss the SMDJ20 application field and working principle of TVS diodes.

SMDJ20 Application Field

The SMDJ20 is an ultra-fast TVS diode designed specifically for use in large-scale distributed-power systems, including high-voltage railway applications, high-capacity automotive applications, and distributed-energy systems. The SMDJ20 features reverse-peak pulse power capability up to 800 watts, a very low parasitic capacitance, and an operating temperature range of -40°C to +175°C. The diode also features a very low-leakage current structure that ensures its long-term operation in high-temperature environments.

The SMDJ20 diode is designed to provide a fast and efficient response to transient over-voltage conditions without degrading the normal operation of the system. It is able to effectively limit the export of excessive voltage into system components and to provide a level of system protection that exceeds the requirements of most industrial designs.

Working Principle

TVS diodes operate by providing a low-impedance path for high-voltage pulses. When a surge of voltage is applied, the diode rapidly transfers this voltage through itself and then saturates. This short-circuits the pulse, preventing it from impacting system components. The diode is able to dissipate large amounts of energy without sustaining any damage, providing superior protection from transient voltages.

TVS diodes also feature high-speed response times, meaning they are able to respond quickly to transients. This minimizes the possibility of damage to system components and helps ensure reliable operation. TVS diodes are also highly efficient and are able to dissipate very large amounts of energy. This makes them an ideal choice for systems that are designed to operate in extreme environments.

Conclusion

In summary, TVS diodes are a type of diode specifically designed to protect electronics circuits from high voltage surges. The SMDJ20 is an ultra-fast TVS diode designed for high-voltage railway, automotive, and distributed-energy applications. Its low parasitic capacitance and low-leakage current structure ensure that it is able to provide protection in high-temperature environments. TVS diodes operate by providing a low-impedance path for high-voltage pulses and dissipating large amounts of energy without sustaining damage, and they have a high speed of response.