B72650M0110K072 Circuit Protection

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Varistors, or voltage-dependent resistors (VDRs), are electrical components that provide a wide variety of protection functions. They are used to protect circuits from overvoltage and to provide short-circuit protection. One popular varistor is the B72650M0110K072. In this article, we will take an in-depth look at its application field and working principle.

What is the B72650M0110K072?

The B72650M0110K072 is a high-performance varistor with a voltage rating of 7.2kV caused by an 8/20 µs current waveform. It is a single-sided aluminum surfacing mounted on a non-voyeur surface.

Some of the features of this varistor include:

• Low clamping voltage and capacitance.
• Excellent surge handling ability.
• High ESD protection.
• High thermal stability.

Application Field

The B72650M0110K072 is commonly used in power electronic applications, such as in the automotive industry. It provides overvoltage and overcurrent protection and can be used in a variety of applications such as automotive electronics, telecom, datacom, AV products, and consumer electronics.

It is also an ideal solution for protecting circuits such as fans, motors, solenoids, and other electrical components from voltage transients. It is a reliable solution for lightning and surge protection of industrial and telecommunication field equipment.

Working Principle

The working principle of the B72650M0110K072 varistor is based on its nonlinear V-I characterization. As shown in the figure below, when the voltage across the varistor increases, the current through it also increases exponentially. The voltage across the varistor is then limited to a certain value, called the "clamping voltage."

When there is a surge or transient voltage across the varistor, the current through it increases exponentially until the maximum point (P) is reached. When the current reaches P, the varistor\'s resistance then increases drastically, limiting any further increase in the current through the device and limiting the voltage across it (VClamp). Thus, the voltage is clamped at the desired level, and the varistor\'s properties help protect the circuit from damage.

Conclusion

The B72650M0110K072 is one of the most popular varistors on the market. It is ideal for a variety of automotive, telecom, datacom, and AV applications. Its working principle is based on its nonlinear V-I characterization, and it provides excellent surge protection. If you\'re looking for a reliable, cost-effective varistor, this is the one for you.

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