V480LA40CP

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TVS - Varistors, MOVs include V480LA40CP, which can be applied in many fields due to its superior protection ability. This article is about its application field and working principle.

Application Fields

As a transient voltage suppressor (TVS) device, V480LA40CP is widely used in various industries. For example, V480LA40CP can be used in communication, consumer electronics and industrial applications. In communication, V480LA40CP is applied in subscriber phone lines, radio waves and data communication links, providing ESD, EFT and surge protection in order to avoid an outage of the system. In consumer electronics, it can be used in AC/DC power supplies, battery chargers, navigation systems, PDAs and portable devices to protect from voltage surge. It is also applied in industrial applications such as motor control system, automobile equipment, audio & video equipment, electric tools and lighting equipment. In this way, V480LA40CP can prevent electrical system from lightning static electricity, broken circuit, and short circuit.

Working Principle

V480LA40CP is a voltage-dependent multilayer varistor (MOV). When voltage exceeds its rated clamping voltage, a relatively low resistance is offered by it. Its internal structure contains a number of metal-oxide layers that are connected in series and parallel. Under normal state, each of the metal-oxide layers has a negative temperature resistance. When an overvoltage triggers the varistor, these layers can neutralize each other, resulting in low resistance and allowing the current to pass through. As the metal-oxide layers provide a large amount of stored energy, under certain conditions, the current flowing through V480LA40CP can reach an extremely high value, as high as 5kA. After the overvoltage is removed, V480LA40CP will quickly recover and protect the equipment from overvoltage.

At this point, it should be noted that V480LA40CP only works when its width and length of impedance are lower than the linear area of the device. In other words, if the current or voltage excursion exceeds the low carrying capacity level of the device, or if the width of the voltage curve is too wide, V480LA40CP will not be able to protect the circuit from overvoltage.

In conclusion, V480LA40CP can help protect a system from damage due to overvoltage. It is widely used in many industries due to its superior protection. Its working principle is based on the negative temperature coefficient of its metal-oxide layers and its ability to provide low resistance under an overvoltage.

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