B72214T2171K105

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TVS (Transient Voltage Suppressors) and MOVs (Metal Oxide Varistors) are essential components widely used to protect systems from transient voltage peaks. This article introduces B72214T2171K105, a type of MOV devices, and discusses its applications and working principle.

Applications

The B72214T2171K105 is suitable for applications in the telecommunications, computer, instrumentation and automotive sectors. It can be used to protect low voltage circuits from destructive transient voltage spikes and surges. It is suitable for use in Alternating Current (AC) lines with overvoltage protection applications.

The B72214T2171K105 can be used in single-phase motor protection applications where transients can expose motor and load circuits to high voltages and currents. In this case, it is used to protect against voltage spikes caused by instabilities in the motor circuit or occurring due to an external switching device.

Apart from motor protection, the device can also be used for overvoltage protection on printed circuit boards (PCB). This is due to its ability to reduce voltages and currents that may cause PCB failure.

Working Principle

The B72214T2171K105 is a type of MOV device that utilizes a metal oxide varistor (MOV) element as its main component. It is composed of two terminals with an MOV element connected between them. When external voltages exceed a certain threshold, the MOV element begins to reduce the impedance of the device. This allows large current to surge through, limiting the high voltages to a safe level and protecting the surrounding components from damage.

The MOV element acts as a kind of voltage-dependent resistor (VDR) as its resistance changes greatly with the applied voltage. In other words, when the applied voltage is below a certain level, the device has high resistance and will not allow current to flow through it. However, if the applied voltage exceeds a certain level, the resistance will sharply decrease and current will surge through the device.

Conclusion

In conclusion, the B72214T2171K105 is a type of MOV devices widely used to protect low voltage AC lines, single-phase motors, and PCBs against dangerous transient voltages and currents. It utilizes a MOV element as its main component which acts as a voltage-dependent resistor with a large impedance change depending on the applied voltage.

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