SMLJ26A

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The SMLJ26A is part of the TVS diode family of devices. TVS stands for transient voltage suppression, which is a term used to describe devices that protect against voltage transients. These transients can be caused by lightning, ESD (electrostatic discharge), or other over-voltage sources. The SMLJ26A is a bidirectional device, meaning it can protect against transient voltages in both directions – positive and negative. The device is available in a variety of voltage ratings, from 5 to 200 volts.

The basic construction of the SMLJ26A consists of a pair of back to back Zener diodes with an integrated series resistor. This structure allows the device to be self-protected against excessive surge current and voltage transients. When triggered, the Zener diodes conduct a constant current, even when subjected to high voltage transients. This ensures that the clamping voltage is always at the stated voltage rating of the device. The series resistor further limits inrush current to safe levels.

The SMLJ26A is typically used in applications that require device protection from voltage transients. Some examples of such applications include motor control systems, data communication systems, power supplies, and automotive electrical systems. There are many other environments that the SMLJ26A can be used in, and it is up to the designer to determine which application is most suitable for their particular requirements.

The operation of the SMLJ26A is relatively straightforward. The device is triggered when the voltage on either the anode or cathode exceeds the voltage rating of the diode (e.g. 5V, 10V, 15V, etc.). Once triggered, the device will conduct a constant current, even under high voltage transients, and will remain in the conducting state until the voltage returns to a safe level. This protection is provided independently for both polarities, so it provides protection against voltage transients in both directions.

The SMLJ26A is an extremely useful device for protecting sensitive electronic equipment. It can provide protection against both positive and negative voltage transients, allowing designers to provide a reliable safety margin for sensitive components. This makes it suitable for a wide variety of applications, from automotive systems to power supplies. It is an ideal choice for designers who require reliable protection from voltage transients.

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