B72210S2621K101

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TVS devices, such as varistors, Metal Oxide Varistors (MOVs), and Transient Voltage Suppressor (TVS) diodes, are used in various applications to protect circuits from transient voltage surges and high voltage spikes. The B72210S2621K101 varistor is a popular TVS device mainly used in signal lines, ground lines and power lines in various consumer electronics and automotive applications. This article describes the application field and working principle of the B72210S2621K101 varistor.

Applications

The B72210S2621K101 varistor is a voltage surge protector device designed for various applications in automotive electronics and consumer electronics such as: television sets, computers, cell phones, CD players, radios, switches, power supplies and similar devices. It is designed to protect sensitive lines in these applications from transient voltage and surge-related faults, such as power cross, voltage spikes, and ground loops, which can cause permanent damage or destruction to sensitive components.

The B72210S2621K101 varistor is also suitable for various industrial applications where surge protection is necessary, such as welding and process control systems, and HVAC (heating, ventilation, and air conditioning) controls.

Working Principle

The B72210S2621K101 varistor is composed of a ceramic element and electrodes. This type of varistor is a non-linear device. It uses an intrinsic property called the voltage-current characteristic to effectively absorb voltage surge. The voltage-current characteristic of varistors is such that when the applied voltage is below a certain value, usually known as the clamp voltage or breakdown voltage, the current through the device is relatively low. However, when the applied voltage exceeds the breakdown voltage, the current through the device increases exponentially.

When a voltage spike occurs, the electric current is quickly diverted to the device, which acts as a lightning arrester, absorbing the energy and shunting it to ground as heat. As the varistor heats up, its breakdown voltage shifts to higher values, making it increasingly effective at clamping large transient events. Because of this, the varistor is able to effectively reduce the voltage swing of the transient.

Conclusion

The B72210S2621K101 varistor is a popular transient voltage suppressor device mainly used in automotive electronics and consumer electronics. Its application fields cover numerous areas where surge protection is necessary, such as television sets, computers, cell phones, CD players, radios, switches, power supplies and industrial applications such as welding and process control systems, and HVAC controls. It is composed of a ceramic element and electrodes and it uses an intrinsic property called the voltage-current characteristic to effectively absorb voltage surge. When a voltage spike occurs, the electric current is quickly diverted to the device, which acts as a lightning arrester, absorbing the energy and shunting it to ground as heat. This allows the B72210S2621K101 to effectively reduce the voltage swing of the transient.

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