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TVS - Varistors, MOVs

A varistor or a metal-oxide varistor (MOV) is a voltage-dependent resistor with a non-linear current-voltage characteristic. It is an electronic component that is widely used in various applications such as motor control and protection, as well as sensitive control of voltage regulation applications. The ROV10-751K-S-2 is a MOV with a maximum voltage rating of 751V and a maximum dissipation of 10 Watts. This device is widely used as a surge protection component for many applications due to its capability of providing reliable protection against voltage surges.

Working Principle of Varistors

When a varistor (MOV in this instance) is usedfor surge protection, it starts working when the voltage applied to it exceeds the maximum permissible rating. Upon exceeding the maximum permissible rating, the current in the device increases exponentially and is discharged to ground. This helps in lowering the voltage level to something that is safe and acceptable for the connected equipment. During such discharging operations, energy is consumed in the form of heat.

ROV10-751K-S-2 Application Fields

ROV10-751K-S-2 is a robust surge protection device and is widely used for various types of electrical circuits. Basically, they are widely deployed in situations that may result in voltage surges.

1. Power Supplies: The ROV10-751K-S-2 is ideal for use in power supplies, especially those with high wattage limit. The surge protection device helps in protecting expensive power supply hardware from lightning, power surges, and electrical disturbances.

2. Automotive: The MOV is also used in automobiles. It helps in limiting the voltage levels on critical automotive components such as ECUs and fuel pumps.

3. Consumer Electronics: It is also used in consumer electronics such as smartphones, tablets, and other personal electronic devices. It protects the devices from voltage spikes and related issues.

4. Industrial Electronics: The ROV10-751K-S-2 is also used in industrial equipment to protect against voltage spikes along the signal pathways.

Advantages of MOV

1. Compactness: MOVs are relatively smaller in size when compared to other surge protection components such as RC networks and gas discharge tubes.

2. Ease of Installation: They are relatively easy to install and require minimal wiring.

3. Bandwidth: MOVs provide a wide bandwidth for surge protection and can withstand surges of greater magnitude.

4. High Conductivity: The MOV features high conductivity, which in turn improves the circuit performance significantly.

5. Low Cost of Ownership: MOVs are highly cost effective to install and maintain. This further contributes to their widespread adoption among various electronic applications.

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