MOV-14D121KTR Circuit Protection

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Transient voltage suppressors (TVS) and metal oxide varistors (MOVs) are widely used to protect electronic and electrical systems from the potentially damaging effects of transient voltage surges and related electrostatic discharges (ESD). MOV-14D121KTR is a Metal Oxide Varistor (MOV) rated at 14V and 121K which is primarily used in portable electronics and wireless communication devices.

Applications

MOV-14D121KTR comes with a variety of features that make it suitable for a number of applications, including:

• Protection of consumer electronics from power surges and ESD
• Cell phone chargers, laptop chargers, and other portable electronic device chargers
• Lighting systems and home appliances
• Motion control systems and motor drives
• Industrial equipment and process control systems

MOV-14D121KTR can also be used in automotive applications such as automotive interior lighting, airbag control systems, and electronic fuel injection systems.

Working Principle

MOV-14D121KTR works on the principle of non-linear voltage clamping. When the voltage across the component exceeds the clamping specified in the datasheet, current begins to flow through the device. This current reduces the voltage across the device, helping to protect the system.

When the voltage returns to a safe level, the device stops conducting current and the device\'s voltage returns to normal. MOV-14D121KTR is a non-limiting, voltage-dependent device, which means that it requires a fault current of at least several microseconds to trigger its protective action.

Ease of Installation and Limitations

MOV-14D121KTR is relatively easy to install, requiring only two leads connected to the power source and connected. With its small size, MOV-14D121KTR can be used in a variety of applications. However, the device is limited to use in DC circuits or where the AC voltage does not exceed the instantaneous peak voltage of the circuit.

MOV-14D121KTR has a thermal runaway characteristic in which, when the device is overloaded, its resistance increases as the temperature increases. This characteristic can substantially reduce the peak voltages and energy dissipation of the device in case of a fault.

Conclusion

MOV-14D121KTR is a Metal Oxide Varistor (MOV) rated at 14V and 121K which is primarily used in portable electronics and wireless communication devices. It can provide protection against transient voltages and currents, making it a suitable choice for consumer electronics and other systems. MOV-14D121KTR is also relatively easy to install and limits its use in DC circuits or where the AC voltage does not exceed the instantaneous peak voltage of the circuit.

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