V18ZS05

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V18ZS05 Application Field and Working Principle

Varistors, MOVs (metal oxide varistors) as one type of Voltage-Dependent Resistor, are widely used for the protection against transient voltage surges. V18ZS05 Varistor (VDR) is one of the popular MOVs with excellent surge suppression performance and is applicable for many kinds of electronic devices and communication systems.

Application Field

V18ZS05 VDRs can be widely used in different types of circuit, ranging from low voltage power supply, industrial control, household appliances to computers, aviation, and airborne equipment. It is favored especially in power applications to reduce surge effect, and thus protect electronic device from possible damages.

Working Principle

VDRs are composed of different levels of zinc oxide and other materials that form granular structure and create the semiconductor type component functioning under Voltage-Dependent Resistor (VDR) principle. Specifically, when VDRs are exposed to certain voltage level (called clamping voltage) or above, electrons will be activated and jump from its granules to the metal layer. As consequence, VDR’s electrical resistance will sharply decrease, so as to inhibit the current from flowing or reduce the current which is for protection purpose.

Besides, when overload current is too high for a VDR, the granules will turn into molten metal and dropdown, so that the connection between electrodes will be interrupted and the current can no longer flows, eventually protecting the device.

Conclusion

V18ZS05 Varistor (VDR) is one popular type of MOVs with outstanding surge suppression performance. Its application field covers numerous fields, ranging from power supply to aviations. In addition, its working principle is based on VDR (Voltage Dependent Resistor) principle, which is proved to be efficient for surge protection as electrons jump between granules and the metal layer.

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