SMBJ75CD-M3/I Circuit Protection

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The SMBJ75CD-M3/I series is a bidirectional TVS (Transient Voltage Suppressor) diode designed to protect sensitive electronics from electrical over-stress caused by voltage transients. It is suitable for applications up to 1500W peak pulse power per line for 8/20 us waveforms. Available in DO-214 package for surface mounting.

The current limiting capability of the SMBJ75CD-M3/I makes it an ideal choice for protection in a variety of situations, such as: consumer electronics, telecommunications systems, office and industrial equipment, and automotive systems. The SMBJ75CD-M3/I series allows for bi-directional protection and is compatible with standard Low Voltage Differential Signalling (LVDS) devices.

The working principle of the SMBJ75CD-M3/I series is simple. Its bidirectional capacitance is activated when a voltage differential across it exceeds the breakdown voltage, which is typically between 5V and 15V for the SMBJ75CD-M3/I series. Once the voltage differential reaches the breakdown voltage, the capacitance of the SMBJ75CD-M3/I is enabled, allowing it to clamp the voltage to the designed breakdown voltage. The SMBJ75CD-M3/I then automatically restores to its low capacitance state when the over-voltage or over-current condition subsides.

The SMBJ75CD-M3/I series is designed so that it can limit the voltage in both directions, which allows it to provide protection against both over-voltage and under-voltage conditions. This makes it a very attractive option for protecting sensitive electronics from undesirable electrical over-stress. Additionally, the SMBJ75CD-M3/I offers a low maximum capacitance so as not to interfere with the operation of sensitive electronics.

In conclusion, the SMBJ75CD-M3/I series is an excellent choice for transient voltage and current protection. Its low capacitance offers protection without interfering with the normal operation of the electronics, and its bi-directional protection allows it to limit voltages in both directions.

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