V9MLA0805LNT

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TVS – Varistors, MOVs

Varistors, also known as voltage-dependent resistors (VDRs), are resistive elements whose resistance decreases with increasing applied voltage. This type of semiconductor is commonly used to protect sensitive electronics from over-voltage or transient spikes. In this article, we will look at the application field and working principle of the V9MLA0805LNT, a commonly used varistor.

Application Field

The V9MLA0805LNT is a surface-mount varistor (or MOV – metal–oxide varistor) and is designed for use in low and medium voltage applications. Commonly found in power supplies, the V9MLA0805LNT can be used to protect sensitive electronics from over-voltage transients and spikes.

These are some of the applications of the V9MLA0805LNT:

• Automotive electronics
• Telecommunications and networking
• Medical equipment
• Consumer electronics
• Industrial electronics

Working Principle

The V9MLA0805LNT is a multilayer varistor that consists of multiple zinc oxide layers separated by an insulating material. When a voltage is applied to the device, the zinc oxide layers become charged and create an electric field. This electric field causes the metallic conduction path to form, which lowers the resistance of the varistor.

The varistor has a breakdown voltage, which is the voltage at which the varistor begins to conduct. When the voltage exceeds the breakdown voltage, the varistor begins to conduct and can dissipate large amounts of energy, thus preventing the voltage from rising further. The V9MLA0805LNT is rated for a breakdown voltage of 8 volts.

When the voltage drops below the breakdown voltage, the varistor ceases to conduct. The device then reverts to its default, off-state, high-resistance value.

Conclusion

The V9MLA0805LNT is a multilayer varistor designed for low and medium voltage applications. It is commonly used in power supplies to protect sensitive electronics from over-voltage and transient spikes. The device has a breakdown voltage of 8 volts and reverts to its off-state, high-resistance value when the voltage drops below the breakdown voltage.

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