SMBJ28-E3/5B

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Transient voltage suppressors (TVSs) are a type of protection device used to protect integrated circuit components and equipment from an over-voltage environment. TVSs are used in the electronic circuit design of most consumer electronics, computer systems and automotive designs. The SMBJ28-E3/5B is a unidirectional TVS diode designed to protect the integrated circuit from voltage transients.

The SMBJ28-E3/5B is designed to protect integrated circuits from high voltage transients from source to ground. The device has a working voltage of 28V and a peak pulse power of 5KW. It is a surface mount, unidirectional device with an extremely low capacitance of 0.02pF. The device can absorb high voltage transients up to 33V without affecting the performance of the integrated circuit.

The SMBJ28-E3/5B can be used in a variety of application fields, including automotive, computer and consumer electronics. In automotive applications, the device is suitable for protecting the various microprocessors, memory modules, and other systems from ESD and voltage transients. In consumer electronics, the device is suitable for protecting sensitive circuitry from voltage transients and ESD events. The device can also be used in computer applications, such as protecting the main board, GPU, and other system components from ESD and voltage transients.

The working principle of the SMBJ28-E3/5B is based on the avalanche breakdown of the junction of a P-type semiconductor and an N-type semiconductor. When a high voltage transient occurs, the avalanche breakdown occurs and the junction starts to conduct current. The diode then self-triggers and clamps the voltage at the junction. The current through the diode is limited due to the on resistance of the device. When the transient voltage is within the operating range, there is no current flow.

In summary, the SMBJ28-E3/5B is a unidirectional, low capacitance TVS diode used to protect sensitive circuitry from voltage transients and ESD events. It is designed for use in automotive, consumer electronics, and computer applications. The device is based on the avalanche breakdown principle, and it has an operating voltage of 28V and a peak pulse power of 5KW. The device can absorb high voltage transients up to 33V without affecting the performance of the integrated circuit.

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