SMCG28A-M3/9AT

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TVS - Diodes: SMCG28A-M3/9AT Application Field and Working Principle

Transient Voltage Suppress (TVS) devices are widely used to protect modern electronic systems from high voltages and electrical-fast transient (EFT) surge, as well as electromagnetic interference (EMI) and high- frequency electrical noise. They consist of low-voltage diodes or varistors that have a fast response time compared with other surge-protection systems. One example of such a device is the SMCG28A-M3/9AT, which is a bidirectional unidirectional transient voltage suppressor specifically designed to protect high frequency components from overvoltage and overcurrent transients.

The SMCG28A-M3/9AT is a 400W unidirectional TVS diode, and its principle of operation is based on the principle of Zener diode. It uses a Zener diode to absorb a part of the input voltage, while the other part is passed through a silicon diode. By doing this, the peak voltage is limited to the clamping voltage, and any energy exceeding this limiting voltage is dissipated via the Zener diode. This makes it ideal for applications such as line surge protection, data interface protection, and signal conditioning.

The SMCG28A-M3/9AT has a maximum clamping voltage of 48V, making it suitable for use in high-voltage and high-frequency applications. It also has a reverse breakdown voltage of 43V, which helps to reduce the voltage stress under surge conditions. Furthermore, it has a fast response time of less than 1 ns, making it an ideal choice for high-frequency applications.

The SMCG28A-M3/9AT is also UL recognized, making it a safe option for a wide range of applications. It has been specifically designed for applications such as automotive, telecomms, medical, industrial, and consumer electronics, where it is used to protect against overvoltage, ESD, EFT, and transients.

The SMCG28A-M3/9AT is typically mounted on a printed circuit board (PCB) and connected to the circuit with soldered connections. It is important to ensure a proper installation of the device, and that it is properly grounded. Additionally, the device should be positioned close to the component it is protecting, as this ensures that the device can act fast enough to protect the component from overvoltage or overcurrent transients.

In conclusion, the SMCG28A-M3/9AT is a 400W unidirectional transient voltage suppressor designed for applications involving high voltages and high-frequency surge protection. Its fast response time and low-clamping voltage make it ideal for protecting components from overvoltage and overcurrent transients. Additionally, its UL recognition makes it a safe and reliable device for many different applications.

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