9401240000

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TVS (transient voltage suppressors) varistors, MOVs (metal oxide varistors) are two common voltage varistors used in electronics industries. Both types of varistors operate in a manner that is voltage dependent, meaning they will only divert large voltages away from sensitive components and circuitry. This protective circuitry is essential in protecting sensitive components and devices from being damaged or destroyed during a large voltage spike.

9401240000 Application Field and Working Principle

TVS-varistors are designed to limit transient overvoltages and reduce electromagnetic interference (EMI) from the power conversion system. The 9401240000 series is a medium surge voltage suppression device that employs a zinc oxide element with high-temperature co-fired ceramic termination for electrical overstress/electrostatic discharge (EOS/ESD) protection in applications such as home appliances, industrial/consumer electronics.

The role of the TVS-varistor is to safeguard power electronic components from transient overvoltages. It has an enclosure which is composed of zinc oxide grain, which creates a high electrical resistance between the electrodes in normal working temperature, ensuring an almost zero residual voltage. When an overvoltage occurs, the TVS varistor will start to conduct the energy and the varied resistance between the electrodes reduces the current generated by the transient.

MOVs consist of sintered pellets of zinc oxide with electrodes at each end. When current passes through the MOV, the element will heat up, causing the material to permanently change its characteristics to create a low impedance path. The low impedance path helps to divert any additional current, while still remaining low enough so as to not cause harm to the sensitive components. As the current dissipates, the MOVs will eventually cool back down to their original state.

The essential principle of MOVs is voltage dependent. As voltage increases, so does the resistance of the MOVs element. Therefore, as voltage increases, the current will be diverted away from the sensitive components and can no longer cause any damage. As the voltage decreases, so does the resistance, allowing the current to eventually pass through the MOVs. This means that the MOVs will only protect during higher voltage spikes and not during normal frequencies.

In conclusion, both TVS-varistors and MOVs are important in the electronics industry and the application of 9401240000 series shows the flexibility of TVS-varistors in different scenarios. They both provide a method of voltage protection for sensitive devices and components in the event of a voltage spike or surge. With different applications, they can be used to de-spike incoming signals or even provide reactance to keep steady voltages. MOVs are great for protection against higher level static electricity while TVS-varistors are great for low power protection against general static electricity.

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