MOV-14D221K

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TVS – Varistors, MOVs are a form of energy-absorbing devices used mostly in power and signal conditioning circuits. The MOV-14D221K is a particularly popular energy-absorbing device, used for a variety of applications. This article will discuss the application field of the MOV-14D221K and the working principle behind it.

Application Field

The MOV-14D221K is primarily used in the power and signal conditioning circuits for automobiles, air-conditioners, white goods, and other applications. The device can offer protection from fast transients, electromagnetic pulses, and other power surges. Additionally, the MOV-14D221K is also used in power distribution systems and Consumer Electronics (CE) products. The device can provide over-voltage, over-current, and over-temperature conditions. Notably, the MOV-14D221K is also well suited for protecting circuits from lightning, wiring, and motor noise.

Working Principle

The MOV-14D221K is a Metal Oxide Varistor (MOV). It works by providing a resistance that increases with the applied voltage. This effectively limits the amount of current that can flow through the circuit. This protection is possible because the MOV has a lower resistance when the voltage is low, and a higher resistance when the voltage is high. When an over-voltage occurs, the current is diverted away from the vulnerable components in the circuit, thus protecting them from damage.

The metal oxide in the MOV further increases its performance, as it provides a high absorption rate for short circuits. Additionally, the metal oxide also has thermal-resistant properties which allows it to dissipate heat quickly when current passes through. This helps to ensure the longevity of the MOV by reducing the risk of overheating.

The MOV-14D221K is rated at 14 V/µF, and is available in 1-4kV forms. It can handle impulse voltages up to 10kA, and is capable of continuous operating temperatures of up to 130°C/ 266°F. The device is available in various packages, including surface-mount, cylindrical, and snap-in options. It is RoHS compliant and UL recognized.

Conclusion

The MOV-14D221K is a widely used energy-absorbing device for power and signal conditioning circuits. It can offer protection from lightning, wiring, and motor noise, as well as fast transients, electromagnetic pulses, and other power surges. The MOV offers a resistance that increases with the applied voltage, thus providing an effective protection method. It is rated at 14 V/µF, and is available in various forms and packages. The device is also RoHS compliant and UL recognized.

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