VDRH10S140BSE

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Transient voltage suppressors (TVS) are widely used in electronic circuits to prevent transient high-voltage spikes from damaging sensitive components. Most TVS devices are unilateral devices meaning that they only conduct current when the voltage across them exceeds a certain threshold value. Among the many shapes and sizes of TVS devices, the VDRH10S140BSE varistors have been used widely as both a surge protector and a built-in circuit component. This article will discuss the application field and working principle of VDRH10S140BSE varistors.

Application Field

The VDRH10S140BSE varistors are suitable for protection against surge and over-voltage events caused by lightning or switching transients. They are also used to protect circuit elements such as transistors, diodes, integrated circuits and printed circuit boards from possible over-voltage and surge damage. VDRH10S140BSE varistors are most commonly used in power plants, communication systems, and power distribution systems. Their ability to withstand high voltage and surge events makes them a cost effective and reliable choice for these application fields.

Working Principle

VDRH10S140BSE varistors are constructed of a ceramic body and two electrodes. The ceramic body is made up of two layers with a high concentration of zinc oxide particles embedded between them. When a transient voltage increases on the circuit, the voltage across the varistor increases and a forward bias in the form of conduction current is established between the two electrodes. During this conduction period the varistor acts like a resistor in that it dissipates the energy from the transient voltage spike into heat.

The VDRH10S140BSE varistors also have the ability to self-heal; that is, if the transient voltage spike is short and located at the terminals of the varistor, the zinc oxide particles’ stored energy will bounce back into the body of the varistor and a thermal shutdown of the excess current will occur. This will help protect the sensitive components in the circuit from damage.

Conclusion

The VDRH10S140BSE varistors are among the most widely used varistors and are ideal for protection against surge and over-voltage events. Typical applications include power plants, communication systems, and power distribution systems. Their ceramic body and two electrode design make them a reliable and cost effective solution for these industry areas. The ability of VDRH10S140BSE varistors to withstand transient voltages and to self-heal in some cases makes them an essential component in any device design.

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