SMBJ20A-QH

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TVS stands for Transient Voltage Suppressors. They are a diode-based protection device primarily used to protect electronic components from voltage transients. These transients can be caused by surges in the power supply, overvoltage or electrostatic discharge (ESD). The TVS diode\'s ability to shunt high surge currents away from components is critical in ensuring the lifetime and reliability of the system.

The SMBJ20A-QH is a unidirectional, surface-mount TVS diode that is designed to protect sensitive electronic components from voltage surges or ESD. The SMBJ20A-QH features fast response time; low capacitance, and low leakage current, and is optimized for ESD protection applications. The SMBJ20A-QH is a dual junction device, meaning it has two P-N junction diodes that are connected in series, with each diode having a different reverse breakover voltage. This allows the SMBJ20A-QH to handle different voltage levels and also provides a higher level of protection.

The SMBJ20A-QH has a maximum reverse breakover voltage of 20V and a breakout voltage of 18V. It is capable of handling surge currents up to 200A peak. The response time is typically less than 1 nanosecond, making it suitable for fast transient protection. The SMBJ20A-QH is also AEC-Q101 rated, meaning it has been tested and shown to meet the automotive industry\'s reliability requirements.

The working principle of the SMBJ20A-QH is based on its two P-N junction diodes. When the voltage applied to the diode is below the reverse breakover voltage, the diode acts as an open circuit, allowing no current to flow. However, when the applied voltage exceeds the reverse breakover voltage, the diode breaks down, allowing current to flow. The voltage at which the diode breaks down is known as the breakdown voltage.

The SMBJ20A-QH is ideal for transient protection applications in a variety of sectors including automotive, consumer electronics, telecommunications, and industrial. It can be used to protect microcontrollers, sensors, and other low voltage electronic components from over-voltage conditions such as ESD, lightning strikes, and power supply surges. The SMBJ20A-QH is available in a variety of surface-mount and through-hole packages, giving designers the flexibility to choose the package best suited for their application.

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