V131NA34 Circuit Protection

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Varistors, MOVs and other protective components are critical elements for safeguarding applications from electric surges. The V131NA34 is a Varistor product manufactured by Littelfuse, Inc., a leader in circuit protection technologies. This particular Varistor offers highly reliable protection from voltage transients to networks equipments. Varistors provide protection against damage caused by voltage transients that can occur due to sudden load shifts or power surges and offer a combination of low leakage current and fast response time.

The V131NA34 Varistor is designed for applications requiring transient voltage surge protection, and is useful for protecting critical circuits from transient overvoltage spikes. This Varistor is especially suitable for data acquisition and interface circuits that use high speed I/O, as it provides maximum two-way protection from transients and gives great noise suppression. It is also applicable for ESD (electrostatic discharge) protection.

This Varistor is a plastic encapsulated device that is surface mountable and offers great dissipation of heat within its epoxy package. The device is offered in a standard T4 case size and has three terminals, including a common connection. The operating temperature of this component ranges from -40°C to +105°C. These devices also come with a High Temperature Overvoltage Protection (HT03) feature, which is an extended 10/1000µs Pulse Wave, rated at 7.5kW.

The V131NA34 Varistor is designed for a wide range of applications, such as computers, TVs, digital office equipment, industrial control systems, and communications systems. This Varistor combines low leakage current ratings with a fast response time to ensure maximum protection against voltage transients.

The working principles of this Varistor are based on the Voltage Dependent Resistor (VDR) concept: the resistance of the device decreases when the applied voltage increases. This is because the device is equipped with a nonlinear semiconductor die that liberates its electrons at high voltages, thus reducing the resistance of the device. When the voltage is under the Varistor operating voltage (Vnom), the device has its maximum resistance. When the device is exposed to voltage transients that exceed the Vnom of the device, the resistance decreases, thus allowing a significant current surge to pass.

In summary, the V131NA34 Varistor manufactured by Littelfuse is designed for protection of sensitive circuits against voltage transients. This device provides maximum two-way protection, fast response time, and excellent noise suppression. The device combines the nonlinear properties of the VDR with a fast response time for maximum protection against voltage transients. The combination of low leakage current ratings and fast response time makes this component ideal for protecting critical circuits from transients.

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