B72220P3351K101

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TVS - Varistors, MOVs

B72220P3351K101 is a type of Varistor, also known as Metal Oxide Varistor (MOV). It is mainly used in lightning leakage protection, surge absorption, overvoltage protection, and power system transient overcurrent protection. MOVs, or metal oxide varistors, are nonlinear components that are designed to provide over-voltage protection for different types of electrical circuits.

Working Principle

The B72220P3351K101 metal oxide varistor consists of two main components: an electrode material and an oxide material. The oxide material acts as a resistive component, while the electrode material acts as a conduction path. When a varying current flows across the electrode material, a voltage is generated due to the electrostatic force created between the two components. This voltage, called the clamping voltage, acts as a limiting factor in the maximum voltage the circuit can attain before the MOV activates.

When the incoming voltage across the MOV exceeds the clamping voltage, the MOV will act as a short circuit in order to protect the circuit from further damage. During this time, all current unable to enter the MOV will be diverted to ground or other protective devices in the circuit. The MOV can then be reset in order to be used again, cutting off the short circuit created when activated.

Application Field

Due to their ability to quickly react to voltage changes and their small size, B72220P3351K101 metal oxide varistors are ideal for use in automotive, HVAC, telecommunications, and consumer electronics. They are commonly used in circuit protection applications, such as power supplies, line filters, and motor drives.

In automotive applications, MOVs are used to protect vehicles from electrical shocks caused by static electricity and lightning strikes, as well as provide protection for sensitive computer systems and other electronic components. They may also be used as surge protectors in heavy equipment intended for outdoor use in extreme environments.

In telecommunications, MOVs help to prevent voltage spikes from damaging sensitive electronics, protect against power outages, and reduce the risk of connector damage caused by electromagnetic interference.

In consumer electronics, metal oxide varistors offer protection against power surges and line noise, as well as keep the electrical system in devices such as televisions, computers, and radios from being damaged.

Lastly, in HVAC systems, MOVs are used to protect the compressor and other mechanical systems from power surges and voltage spikes.

Conclusion

In conclusion, MOVs, such as the B72220P3351K101, are widely used in an array of applications due to their small size and quick response to voltage changes. From automotive to HVAC, metal oxide varistors offer valuable protection to the various electric circuits of a variety of different items and devices.

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