1V5KE27A

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TVS (transient voltage suppressor) diodes provide extra circuit protection from voltage transients. 1V5KE27A is the TVS diode from 1.5KW series. These components are designed to absorb the excessive voltage which can be caused by ESD (electrostatic discharge) or power line transients which generally appears as momentary spike or over-voltage. In this article, we will discuss the application field and working principle of 1V5KE27A TVS diode.

The 1V5KE27A TVS diode is mainly used for electronic system, instrumentation, automotive and communication equipments. This kind of diode is used because it provides reliability, low operating voltage, excellent surge current handling capability, fast response time, and easy installation. It was specially designed for transient overvoltage protection in automotive and industrial equipments. It provides protection against common port surges, electrostatic discharge (ESD) and lightning.

The working principle of 1V5KE27A TVS diode is simple and can be divided into two main categories. The first category is avalanche breakdown. Avalanche breakdown is when a diode is placed in an environment with a very high voltage, the electrons in the n-type region of the diode are accelerated to such a speed that they collide with the atoms of the lattice structure of the n-type region, which results in free electrons and free holes. The free electrons and holes can then easily move in the n-type region, which reflects on the voltage-current characteristic of the device and reduces the breakdown voltage of the diode. In this way, the diode can conduct current and divert it away from the protected component, thereby protecting it.

The second category is Zener Breakdown. The working principle of Zener breakdown is similar to avalanche breakdown. Basically, Zener breakdown occurs when electrons are accelerated to a point where it causes an electron tunneling. The tunneling creates a low barrier which allows some electrons to pass through. These electrons then move to the p-type side of the diode and adds considerable amount of current. This added current also reflects on the voltage-current characteristic of the device and reduces the breakdown voltage of the diode.

In summary, 1V5KE27A TVS diode is a highly efficient device which provides protection against common port surges, electrostatic discharges (ESD) and lightning. It is mainly used in electronic system, instrumentation, automotive and communication equipments. The working principle of the diode is based on either avalanche breakdown or Zener breakdown, depending on the type and voltage of the diode. It is an important component which provides a reliable protection for delicate electronic equipments.

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