SMBJ90

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The SMBJ90 is a silicon-based transient voltage suppressor (TVS) diode that is commonly used for protecting electronic circuits from electrostatic discharge (ESD). This diode can effectively limit surge current and voltage. It is specifically designed for use in low capacitance, high frequency applications such as those found in power supply components, digital circuits, and communications systems. Its ultra-low capacitance design ensures that it can handle high-frequency signals without any issue.

SMBJ90 diodes have a working voltage range from 85 volts to 264 volts, making them suitable for a wide range of applications. They can be used for suppressing transients induced by ESD in telecommunications solutions, personal computers, medical equipment, AC and DC power control systems, low-current and high-voltage DC-DC converters, and other applications. Furthermore, these diodes are temperature-stable and rad-hard, making them suitable for operating in high-temperature and high-radiation environments.

The SMBJ90 is capable of handling surges of up to 15 kV at 5A, and can be used in circuits with currents up to 150mA. It is capable of protecting against both positive and negative transients, meaning that it can absorb any transient overvoltage regardless of its polarity. The diode also has a very fast response time, making it suitable for applications that require ultra-fast protection. Additionally, its very small size makes it ideal for use in space-constrained applications.

The working principle of the SMBJ90 involves the breakdown of its intrinsic P-N junction. Under surge conditions, this breakdown voltage limits the peak voltage to a maximum allowable level. This limits the generated current via the diode’s intrinsic capacitance, allowing the diode to dissipate the energy generated without damaging the downstream load.

In summary, the SMBJ90 is a highly reliable and efficient diode that can be used to protect against ESD transients in a wide range of applications. It is small and fast-acting, and can protect against both positive and negative transients. Its temperature-stable and rad-hard design makes it suitable for operation in high-temperature and high-radiation environments, and its high current handling capability makes it suitable for use in a variety of applications.

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