SMBJ54CA-M3/5B

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The SMBJ54CA-M3/5B is part of an extensive product line within the category of Transient Voltage Suppressors (TVS). This particular product is classified as Center-to-Center (C:C) Bi-directional Paired, meaning it is designed with dual diodes in one package. It is intended to protect components in a circuit against induced transients between two conductors. The SMBJ54CA-M3/5B is designed to suppress 5kB of surge energy for two 5V lines, and can handle up to 600 W (Watts) of peak pulse power.

The implementation of this TVS diode is mainly in applications that require data transceiving and powerline communications. It is especially designed to surge protection and overvoltage protection of 10/100Base-T Ethernet, USB, IEEE 1394 and HDTV signals. Additionally, the SMBJ54CA-M3/5B can also be assigned to the more general application of confidential information or data transmitted over line or audio and visual transmission systems.

The working principle is rather simple. TVS diodes have a clamped voltage which, normally, is lower than the peak signal applied to it. This means that when the signal rises above the clamped voltage, the output is limited to avoid exceeding the maximum clamping voltage. This is done with a fast recovery times of reverse recovery mode, which is beneficial when dealing with Transient Voltage Suppressors.

Therefore, a TVS diode is acting as a parallel component to the load, and it absorbs any excess voltage above the clamped voltage. Protection is provided until the current exceeds the peak pulse power, at which point it would act as a short circuit. The limitation of current is realized because of the internal resistance of the diode, thus dynamic impedance. In a typical application, a voltage across the circuit will be monitored continuously and, if any transients occur above the operating parameters, the SMBJ54CA-M3/5B will reduce them, limiting the breakdown voltage.

The SMBJ54CA-M3/5B also has a temperature coefficient which emphasizes its designing specifically to powerline communications and data applications. This makes it especially reliable in high temperature environments, for it still functions correctly and has low leakage current values even in a temperature of 125°C.

In summary, SMBJ54CA-M3/5B is a special type device from vast Transient Voltage Suppressors market. It is designed to operate in high temperature and provide utmost protection against transient voltage in powerline communications and data applications. It works by clamping anyvoltage higher than specified operating parameters so that no breakdown or short circuit in the equipment can occur.

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