SMAJ220CE3/TR13

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SMAJ220CE3/TR13 is a TransilTM transient voltage suppressor (TVS) diode, capable of supporting an operable voltage range of 5.0V to 220V. It\'s available as a RoHS compliant, Pb-free, 300mW, axial-leaded SOD-323 package, 2.75mm long. This device belongs to the Transil family, a popular line of TVS diode widely used in a variety of applications.

Transil diodes are primarily used for the protection of low-voltage circuits against transients generated by excessive electrical impulses, such as the pulses created by lightning strikes and electro-static discharges (ESD). As one of the more well-known Transil protective devices, the SMAJ220CE3/TR13 provides a high level of transient protection for most DC/DC converters, automotive and telecommunication systems, as well as set-top boxes and controllers. This particular device particularly stands out due to its ability to absorb both positive and negative impulses; its wide range of operating voltage; its protective features like LED discharge; and its ultra-small and compact size.

How SMAJ220CE3/TR13 Works

SMAJ220CE3/TR13 functions at its core like an ordinary diode, taking advantage of the well-known principle that it is only necessary for the diode to be reverse biased for it to become conductive. When an electrical surge occurs, such as a positive lightning strike or an ESD pulse, the diode will become reverse biased, allowing the current produced by the surge to flow in the opposite direction to its directed one. Thanks to its higher voltage breakdown then that of the ordinary diode, the SMAJ220CE3/TR13 is able to absorb multiple levels of excessive current, safely directing them through its body.

The SMAJ220CE3/TR13 is a “low power term device”, and it discharges the dissipated load as soon as its voltage perception goes back to the regulated level. This is achieved with the help of a built-in LED discharge current feature, which is activated by the overvoltage. The low junction-capacitance characteristic of this TVS diode reduces the time required for the transient voltage to be redirected to the dissipative load. Additionally, it guarantees the output of the electrical circuit being protected from the transients with an extremely low level of jitter, which is perfect for applications like controllers and microprocessors.

SMAJ220CE3/TR13 Application Field & Working Principle

The SMAJ220CE3/TR13 is a TransilTM diode designed for the protection of electronics from transients, particularly low-voltage systems. Its wide operating voltage range, compact size, and low junction capacitance make this diode suitable for protection from transients caused by lightning strikes and ESD pulses. It takes advantage of the reverse biased principle, allowing it to direct current to a dissipative load in the opposite direction to its intended one. It also features a LED discharge current feature, which aids in the discharging of the dissipated load, allowing a low jitter output for controllers and microprocessors.

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