SMBJ26CA-M3/5B

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Transient Voltage Suppression (TVS) diodes are an essential part of any electronic system, providing enhanced protection against electrical transients. The SMBJ26CA-M3/5B is a TVS diode commonly used in applications ranging from consumer electronics to industrial equipment. In this article, we look at the application field and working principle of the SMBJ26CA-M3/5B.

Application Field

SMBJ26CA-M3/5B TVS diodes are typically used in applications where protection against electrical transients is necessary. They are great for automotive applications since they are able to withstand high temperatures and high voltage transients. They are also often used in consumer electronics such as computer monitors and other electronic equipment. They are also popular in industrial applications such as power supplies where they provide effective protection against lightning strikes and power surges.

Working Principle

The SMBJ26CA-M3/5B TVS diode is a unidirectional diode that operates on the principle of avalanche breakdown. The diode is made up of two doped regions sandwiching a thin intrinsic layer. When a reverse voltage is applied to the diode, the thinner intrinsic layer begins to break down, causing a sharp increase in current through the device due to avalanche multiplication. This current is quickly limited to a safe level since the reverse voltage causes an increase in the forward characteristics of the diode, thus preventing the device from being damaged.

When a surge of voltage is applied to the SMBJ26CA-M3/5B, the diode quickly conducts the surge current away from the protected portion of the circuit. This is because the voltage across the diode reduces to a safe level and the current quickly diminishes. This is what makes the TVS diodes so effective in protecting against electrical transients such as power surges and lightning strikes.

Conclusion

In conclusion, the SMBJ26CA-M3/5B TVS diode provides effective protection for a range of applications against electrical transients. The diode is unidirectional, operating on the principle of avalanche breakdown, and it quickly conducts the surge current away from the protected portion of the circuit. As such, it is a great addition to any system that needs enhanced protection against electrical transients.

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