SMCJ90A

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SMCJ90A belongs to the family of TVS - Diodes. It is widely used in the protection of high voltage surges, and other transient impulses from damaging vulnerable circuits. This device is heavy duty, and is built with an innovative design that makes it the perfect choice for high reliability applications.

The SMCJ90A is comprised of a silicon avalanche diode and an integrated Zener diode. The avalanche diode element provides fast, controlled attenuation of the transient impulses, while the Zener diode element acts like a voltage clamp to protect the device and the circuit it is installed into. Device breakdown voltage ratings range from 6.0 to 170 volts.

The avalanche diode element of this TVS - Diode is built with a highly reliable and robust dielectric material that allows for multiple switching cycles without breaking down or generating heat. The Zener diode elements of the SMCJ90A also have low leakage current and can withstand higher transient voltages without becoming damaged.

The SMCJ90A is used widely for applications requiring a device that can withstand higher surges and transient voltages without degrading system performance. It is often utilized in power systems, microprocessor-based systems, sensitive electronic components, telecommunication systems and data networks.

The SMCJ90A also offer integrated ESD protection, and can be used for preventing CMOS latch up that will significantly reduce the likelihood of a device failure. It offers exceptional protection against high energy transients that can otherwise damage sensitive equipment and devices. The device also helps minimize electromagnetic interference (EMI) and reduce board emissions.

The working principle of the SMCJ90A is relatively simple and can be broken down into two distinct stages. During the first stage, the device is off and the diode is forward biased. This causes the voltage across the device to begin to drop, and when the transient voltage reaches the diode’s breakdown voltage, the avalanche diode triggers, switching it off.

This causes the voltage across the device to begin to rise again, and the Zener diode begins to conduct, clamping the voltage across the device at its breakdown voltage. By controlling the voltage across the device, the SMCJ90A can protect the associated circuit from overvoltage conditions that could damage otherwise sensitive components.

In conclusion, the SMCJ90A TVS - Diode is an important device for protecting vulnerable circuits from transient voltages and surges. It is a robust and reliable device that offers several advantages over competing devices, including integrated ESD protection, low leakage current and the ability to withstand higher surge voltages.

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