1.5KE400A-B

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TVS diodes are commonly used in high-voltage and high-speed applications. They are made of semiconductor material and, much like zener diodes, are responsible for clamping high voltages when they are applied across a circuit. This article will explain the application field and working principle of the 1.5KE400A-B.

The 1.5KE400A-B, which is one type of TVS diode, is typically used in robust circuits to reduce voltage spikes. It is designed to protect sensitive electronics from surge currents and voltage transients caused by static electricity, inductive loads, lightning, and short-circuits. It is also used for the protection of vehicles against electrostatic discharges. The working voltage of the 1.5KE400A-B is 400V.

As far as its working principle is concerned, the 1.5KE400A-B utilizes the avalanche breakdown effect during operation. This occurs when the diode is subjected to a voltage higher than its breakdown voltage. Once this threshold is crossed, the diode starts to conduct reaching its reverse breakdown current. At this point, the current flowing through the diode exponentially rises, reducing the voltage across the diode to its clamping voltage. The 1.5KE400A-B\'s clamping voltage is typically 150V.

The 1.5KE400A-B is a unidirectional TVS diode, meaning that it only conducts current in one pre-set direction. This direction is determined by the device\'s cathode and anode electrodes, which are the main components of the device. The cathode is the negative and anode is the positive electrodes. The anode is always the input ,while the cathode is the output.

The 1.5KE400A-B also has a nonlinear characteristic, meaning that at any given threshold voltage, the diode will conduct as long as the voltage is above the threshold. It is important to note that beyond the breakdown voltage threshold, the current can strongly increase, potentially leading to dangerous conditions. This is why it is important to design circuits so that the breakdown voltage of the diode is not exceeded during operation.

TVS diodes are becoming increasingly popular in high-power and high-speed applications, due to their low cost, reliable performance and small footprint. And the 1.5KE400A-B is no exception. It is especially well-suited for applications where a reliable protection is needed against voltage transients, making it an ideal choice for mobile and automotive circuits.

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