AMCV-0402-140-C101N-T

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TVS - Varistors, MOVs are used for a variety of applications, from controlling high voltage surges near electronic equipment to providing surge protection to circuits and systems. The AMCV-0402-140-C101N-T is an example of a MOV, or Metal Oxide Varistor, and is used in the electronic industry for providing surge protection and voltage regulation.

Application Field

The AMCV-0402-140-C101N-T is an ultra-compact Transient Voltage Suppressor (TVS) that is designed for low voltage (5.5V) applications. It is typically used in consumer and industrial electronics, such as telecom, computer, and automotive electronics. Its primary application is to provide surge and transient protection to delicate circuit elements, although it can also be used for voltage regulation and Overvoltage Protection (OVP). Common applications include protection from ElectroStatic Discharge (ESD) and from overloads during power up/down.

Working Principle

MOVs, such as the AMCV-0402-140-C101N-T, operate by using metal-oxide material to absorb excess voltage. This works through its two ends, which are usually connected to ground. When an overvoltage event is detected, the MOV quickly clamps the voltage down to a safe level, thus protecting the connected circuit components.

MOVs are bidirectional and non-linear. This means that the voltage they absorb on one side is not the same as the voltage they absorb on the other side. They also have a defined voltage range and can only absorb a certain amount of excess voltage before the MOV degrades and needs to be replaced.

MOVs also require careful designing and selection due to their non-linear nature. The more current the MOV takes, the higher the voltage it will allow to pass through. This means that if the MOV is subjected to high voltage spikes, it can easily become damaged. Additionally, due to their non-linear nature, the MOV can also be susceptible to “hot spots”, which occur when a specific portion of the MOV heats up, causing it to rapidly degrade and fail.

The AMCV-0402-140-C101N-T is designed to provide enhanced protection from voltage spikes and transients. It offers peak pulse power ratings of 140W (8X20μs pulse waveform) and an UL 1449 rating of 630 volts. It has a breakdown voltage of 7VDC and is designed for high speed switching applications.

Conclusion

MOVs, such as the AMCV-0402-140-C101N-T, offer excellent protection against voltage and current spikes and transients. They are used in a variety of consumer and industrial applications, from telecom to automotive electronics. However, due to their non-linear nature and susceptibility to hot spots, careful design and selecting is required when using MOVs.

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