B72214S0141K551

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TVS (Transient Voltage Suppressors) are electrical components that help protect electronic devices from harmful voltage spikes. Varistors, MOVs (Metal Oxide Varistors) and B72214S0141K551 are among them. All three devices can help protect a PCB (Printed Circuit Board) from voltage spikes, but they accomplish this in different ways.

B72214S0141K551

The B72214S0141K551 is a type of Varistor made by EPCOS, a Siemens Company. A Varistor is a voltage-dependent resistor (VDR) that is designed to act as an electronic surge suppressor and protection device for a wide range of voltage spikes, providing enhanced galvanic isolation and video signal protection. It is a non-linear two terminal device with its resistance varying with the applied voltage. It operates as a voltage limiter, allowing the passage of relatively low voltages but blocking higher ones.

Application Field

The B72214S0141K551 can be used in a wide variety of applications including, but not limited to: telecom, industrial, medical, automation, consumer, data communications, and automotive. For power surges and lightning strikes, it can help prevent damage to sensitive equipment and increase product lifetime. It is especially useful for signal surge protection, as it will limit the volts that a particular signal passes through. Signal spike and theft protection from unauthorized attempts to access power sources can also be very beneficial. Finally, B72214S0141K551 is designed to minimize interference in high-end audio/video applications, such as those used in entertainment systems.

Working Principle

The B72214S0141K551 uses the principle of non-linear resistors, where the resistance varies depending on the applied voltage. When the voltage is below the specified limits, the Varistor will provide a low resistance path, thereby allowing the current to flow freely. But when the voltage rises above its specified limits, the Varistor will provide a high resistance path, and thus provides protection against high voltages. This is accomplished by the Varistor having a “clamping” action on the voltage. It will absorb and limit the voltage, thereby safeguarding the circuit or equipment to which it is connected.

Conclusion

B72214S0141K551 Varistors provide excellent surge and spike protection and are extremely useful in power and signal applications. As part of the MOV family, they have the added benefit of helping to minimize interference in audio/video applications. Their non-linear resistive properties also help reduce wiring costs and make them very versatile in their application field.

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