V56ZT05PX2855

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Most electronics incorporate some form of surge protection to protect against voltage spikes caused by over voltage, which can wreak havoc on the circuitry and damage the device. TVS (Transient Voltage Suppression) diodes, Varistors and MOVs are common components used to provide this form of protection to sensitive hardware. Among these components, V56ZT05PX2855 is a widely used Varistor for over voltage protection.

Introduction

V56ZT05PX2855 is a varistor of the Zorrasteel® family made of High Reliability Zinc Oxide (ZnO) materials developed for protection of sub-gate oxide in MOSFET (Metal–Oxide–Semiconductor Field-Effect Transistor) devices. It has a lightning discharge current capability up to 17.5A. This varistor features extremely fast response time of 10ns and surge current rating of 20A. It has a clamping voltage of 11.3V, an ESD clamping voltage of 3.4V, and an operating voltage of 5.6V.

Application

V56ZT05PX2855 is a highly reliable over-voltage protection varistor suitable for both industrial and consumer devices. Its extremely fast response time and high current rating make it excellent for protecting sensitive electronic components from ESD (ElectroStatic Discharge) and Transient Voltage events. Common applications include consumer electronics, computers, power supply equipment, industrial controllers, and Photovoltaic equipments.

Power supplies are particularly susceptible to over voltage and transient voltage events due to their complex circuitry. Here, V56ZT05PX2855 is used for protecting the sensitive components in the circuitry. Similarly, industrial controllers and process control equipment also benefits from the protection provided by the varistor, helping to improve reliability and durability.

Generally, V56ZT05PX2855 can be used for any application requiring fast response to transient voltage events and lightning strikes to ensure continual operation of the connected equipments.

Working Principle

The V56ZT05PX2855 is a two-terminal device with a voltage clamping behavior that works when a voltage surge greater than the rated peak voltage of the device is applied. It works on the basic mechanism of a voltage-dependent resistor, where the resistance between the two terminals decreases as the surge voltage increases. As the surge voltage reaches the device\'s rated peak voltage, the resistance decreases substantially and almost turns the device into a short, clamping the voltage at the rated peak voltage.

The structure of the V56ZT05PX2855 also features curved grooves on both sides of the varistor which absorbs more energy during a surge event, so that a current peak up to 20A can be controlled. This allows the device to dissipate the energy due to the surge, thereby preventing the voltage from exceeding the rated peak voltage and further damaging the sensitive components.

Conclusion

V56ZT05PX2855 is a reliable and fast-acting varistor suitable for a vast range of applications such as consumer electronics, computers, power supply equipment, industrial controllers, and Photovoltaic equipments. Its extremely fast response time and high current rating makes it ideal for protecting sensitive components from transient voltage events and ESD. The mechanism of the device is based on a voltage-dependent resistor, where the resistance between the two terminals decreases as the surge voltage increases, thereby allowing the device to provide overvoltage protection and dissipate the energy due to the surge.

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