TVS - Varistors, MOVs

VDRH14V420BKE is a type of Transient Voltage Surge Suppressor (TVSS). It acts as a low cost surge protection device used mainly in consumer audio Visual applications. It works by suppressing the voltage spikes that occur due to lightning strikes or other potential circuit faults. This is done via a voltage-limiting diode connected in series between the positive and negative terminals of the device.

Application Field

VDRH14V420BKE TVSs are primarily used in larger consumer audio Visual applications, such as television sets and home entertainment systems. They are also being used in industrial control systems, medical imaging equipment, battery backup systems and HVAC (heating, ventilation, and air conditioning) equipment. The surge protection provided by these devices helps protect vital components in the equipment from dangerous voltage spikes, allowing them to operate safely without risking failure or damage due to overvoltage.

Working Principle

VDRH14V420BKE TVSs work by suppressing the voltage spikes that occur due to lightning strikes or other potential circuit faults. This is done via a voltage-limiting diode connected in series between the positive and negative terminals of the device. When a voltage spike is detected, the diode conducts the extra current away from the circuit, helping to protect the components connected to the circuit. The diode then gradually dissipates the extra voltage, thus limiting the maximum voltage seen by the AV equipment. The device also has a resistor in parallel with the diode, which helps to dissipate the extra current and ensure that the diode does not become overloaded.

Conclusion

In conclusion, VDRH14V420BKE is an effective and low-cost TVSS protection device used mainly in consumer audio visual applications. It provides surge protection to vital components in the equipment, by suppressing voltage spikes caused by lightning strikes or other potential circuit faults. The device is connected in series between the positive and negative terminals of the equipment, and consists of a voltage-limiting diode and a parallel resistor for dissipating the extra current while the diode is conducting.