9401390000

TVS - Varistors, MOVs, 9401390000 Application Field and Working Principle

A varistor, otherwise known as a voltage-dependent resistor (VDR), is a surge protection technology typically used in telecommunication, automotive and other electronics-based products. Varistors protect these products from overvoltage, undervoltage, overloads, and shorts in the electrical system. Varistors are commonly referred to as TVS, or transient voltage suppressors, and they are made of semiconductor metal oxide materials.

Overview of Varistors and MOVs

Varistors are essentially nonlinear voltage-dependent resistors and they act as buffers between voltage peaks caused by overvoltages, undervoltages, or short circuits. Varistor is a general term for two types of devices: varistors (commonly known as MOVs or metal oxide varistors) and TVS, or transient voltage suppressors. MOVs are made of zinc oxide while TVS are made of bismuth-oxide ceramics.

Varistors can protect both low-voltage and high-voltage circuits by operating as an open circuit when the voltage exceeds normal levels. When the voltage is reduced below normal levels, the varistor becomes a closed circuit, allowing the current to flow without interruption. This allows the varistor to act as a power buffer between a power source and a high-voltage device.

9401390000 Application Field

The 9401390000 is a MOV or metal oxide varistor specifically designed for use in automotive electronic applications. It provides surge protection for automotive components such as LCD screens, cameras, ignition systems, starter systems, and other sensitive electronics. This MOV technology can also be used to protect sensitive components from being damaged by unexpectedly high voltages or short circuits.

Working Principle of the 9401390000

The MOV or 9401390000 varistor works by using its internal zinc oxide platelets to provide a buffer between the high voltage and the circuit. The platelets are arranged such that when a voltage exceeding a certain threshold is applied, they create an open circuit, which prevents the high voltage from passing. Conversely, when the voltage drops below the threshold, the circuit is closed, allowing the current to flow. It is important to note that the MOV does not dissipate or absorb the energy from the surge, but rather serves as a conductor between the source and the device being protected.

Conclusion

Varistors are a useful surge protection tool for many high voltage and low voltage electronic circuits. The 9401390000 MOV is specifically designed for use in automotive electronics and provides excellent protection in these applications. The varistor works by acting as a buffer between the source and the device being protected, such that when a voltage exceeding a certain threshold is applied, the platelets of the MOV create an open circuit, which prevents the high voltage from passing.