20KPA192C-B Circuit Protection

Transient Voltage Suppressors (TVS) diodes offer an effective overvoltage protection against electrical surges. As the new generation of overvoltage protection devices, TVS diodes provide low breakdown voltage, fast response, low capacitance and high protection level. The 20KPA192C-B is a type of TVS diode designed for high temperature applications. This article illustrates the application field and working principles of the 20KPA192C-B.

Application Field

The 20KPA192C-B is a high temperature, low capacitance, unidirectional Zener diode designed for transient pulse suppression applications. It has a low dynamic resistance of 3.5ohm and a low clamping voltage of 20V. The device is bidirectional, meaning that it can voltage clamp for both positive and negative transient pulses. This 20KPA192C-B can be used to protect wireless communication devices, automotive electronic circuits and high-speed data transmission systems from voltage overshoots and electrostatic discharges.

Working Principle

When a voltage transient exceeds the breakdown voltage of the 20KPA192C-B, the device will begin conducting current. This process is called zener breakdown, and it allows the current to be transferred from the anode to the cathode. This process is very fast, typically occurring within nanoseconds, making the 20KPA192C-B an excellent choice for transient protection. When the voltage transient is below the breakdown voltage, the 20KPA192C-B behaves like a regular diode, not conducting any current until the specified forward voltage is applied. This is known as the limiting voltage.

The 20KPA192C-B has a low internal capacitance of 2pF. This low capacitance helps to reduce the ringing effect of ringing suppressed power supplies. It also helps to reduce power surges by absorbing their energy and dissipating it in the form of heat.

The 20KPA192C-B also provides overvoltage protection for components downstream of the device. When the device is subjected to a high level of voltage, it will absorb the excess voltage and dissipate it as heat. This helps to protect components upstream of the device from overvoltage damage.

Overall, the 20KPA192C-B provides a reliable, efficient and cost-effective solution for high temperature, high-energy transient protection applications. Its low internal capacitance provides good protection against power surges, and its low clamping voltage reduces the likelihood of downstream damage. It is an excellent solution for protecting wireless communication devices, automotive electronic circuits and high-speed data transmission systems from voltage overshoots and electrostatic discharges.