SMCJ20ATR Circuit Protection

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TVS diodes are widely used in the protection of high-speed electronic circuits from overvoltage, electrostatic, and high speed, single or multiple transients. The SMCJ20ATR is an industry leading TVS device meant to help protect sensitive components from voltage spikes and transient pulses.

The SMCJ20ATR has a very wide range of applications. It is primarily used in the protection of electrical equipment sensitive to high-energy transients, such as data lines, power lines, computers, cell phones, and other consumer portable electronics. It can also be used in controlling the magnitude of transient signals in high-speed signal lines. Additionally, it is used to protect Automotive Electronic Control Units (ECU) from ESD, electrical overstress, and lightning and surge pulses. The SMCJ20ATR is also applicable in the industrial and communications industries, as well as in the medical industry.

The SMCJ20ATR is a unidirectional device and it is designed to protect sensitive components from high-energy transient pulses of up to 20 amperes. This protection is provided by the SMCJ20ATR’s breakdown voltage, which ranges from 7.5 to 20 volts. It is important to note that the breakdown voltage plays a key role in the effectiveness of the device, so careful consideration should be taken when selecting the appropriate breakdown voltage for the application.

The working principle of the SMCJ20ATR is very simple. The protection that the SMCJ20ATR provides is due to its breakdown voltage. When the input voltage exceeds the breakdown voltage, the device starts to conduct current. As the current flows through the device, it causes the electrostatic charges on the surrounding components to dissipate, thus preventing any harm to the components.

The SMCJ20ATR also has a low impedance (<15 ohms) once it is conducting, allowing it to effectively absorb and dissipate any overvoltage transients. This ensures that the device does not create any additional noise signals on the signal lines. Additionally, the device also has an internal shunting effect, which enables it to respond quickly to switches and other signals.

Overall, the SMCJ20ATR is an excellent device for providing protection to sensitive electronic components from overvoltage, electrostatic and single or multiple high-speed transient signals. Its wide applications make it an ideal choice for many industries and applications. It is important to note that the selection of the appropriate breakdown voltage is critical, as it plays a key role in the effectiveness of the device. With proper use, the SMCJ20ATR can effectively provide protection to sensitive components from overvoltage, electrostatic and transient signals.

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