B72242L0421K100

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TVS - Varistors, MOVs, are surge protection devices used to protect a wide variety of equipment such as computers, home appliances, automobiles, industrial machinery, and power supplies. They are used to reduce overvoltages that can damage electronic devices. The B72242L0421K100 is an example of a TVS – Varistor, and this article will discuss its application field and working principle.

B72242L0421K100 Varistors are used in surge absorption circuit applications to protect circuit boards from electrostatic discharge (ESD). The device has a 10µF capacitance rating, which makes it suitable for high-frequency electric wave rectification and AC voltage wave-settling. Its range of voltage rating is between 4.5V and 20V with a current rating of 4.1A. It is also capable of withstanding high-energy spikes up to a maximum of 26V.

In terms of application field, B72242L0421K100 Varistors are commonly used in automotive circuits, audio equipment, home appliances, computers, industrial machines, and other electronic circuits. The device is an ideal solution for providing protection to circuits against transients induced by ESD or lightning. It is also highly effective in preventing overvoltage damage thus ensuring longer lasting durability of electronic circuits and equipment.

The working principle of B72242L0421K100 Varistors is based on the phenomenon of voltage-dependent resistance. A semiconductor material such as zinc oxide is sandwiched between two metal layers and subjected to high voltages. At the cut-in voltage, a unique reverse-biased leakage current begins to flow from the anode to the cathode. With an increase in the voltage level, the beakdown voltage is reached and the material’s electrical resistance drops sharply and the current increases dramatically.

B72242L0421K100 Varistors are designed with multiple layers of zinc oxide that can absorb energy more efficiently than a single layer. The device is further designed with internal capacitance between the layers to reduce the risk of thermal runaway and over-current protection. The zinc oxide material is selected for its high impedance and low dielectric absorption characteristics that allow for greater surge protection capabilities and long-term stability.

In summary, B72242L0421K100 Varistors are used for a wide range of applications due to their high current and surge absorbing capabilities. They are used in automotive, audio, home appliance, computer, and industrial circuits for protection against transients induced by ESD and lightning. The device works on the principle of voltage-dependent resistance, wherein a semiconductor material is sandwiched between two metal layers and subjected to high voltages, allowing for greater efficiency in absorbing energy.

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