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TVS - Diodes

1V5KE39A application field and working principle

TVS (transient voltage suppression) diodes have a unique application--it is designed toprotect electrical circuitry from transient spikes due to ESD (electrostatic discharge),lightning, and motor switching. A TVS diode utilizes a special circuit configuration inorder to securely clamp voltage at safe levels. This is an important function, as it preventsexpensive electronic equipment from being damaged due to voltage transients.

The 1V5KE39A is a six-pin, bidirectional transient voltage suppressor diode which istypically used to protect circuits from electrostatic discharge (ESD) and transients.It serves two primary functions: it allows a maximum working voltage of 25V whilesuppressing any transients above 20V, and it provides high speed, low liability transientprotection while consuming minimal power. The 1V5KE39A measures 2.4x1.45x0.53mmand has minimum leakage current of 0.05µA and maximum capacitance of 4.5pF at 1MHz.

The operating principle of the 1V5KE39A is relatively simple. When a voltage transientexceeds the peak working voltage of the diode, the current has to be limited by thediode. This is done by quickly charging the parasitic capacitance between the anodeand cathode until the voltage across the diode is equal to the breakdown voltage of thediode. This reduces the peak stress the transient voltage would have normally caused.Once the transient has passed, the storage capacitance is allowed to slowly discharge,allowing the diode to quickly reset to a non-conductive state.

Due to its highly reliable performance, the 1V5KE39A is highly sought after in aerospace,industrial and automotive applications. In aerospace applications, the 1V5KE39A is usedin tools and equipment to ensure compliance with aerospace standards. It is used ina similar manner in high-voltage industrial installations, preventing electrical shockand other safety hazards. In automotive applications, the 1V5KE39A is used to protectelectrical systems from voltage spikes caused by aborted engine starts and suddenchanges in engine power.

In conclusion, the 1V5KE39A is an efficient and reliable transient suppression diodewith a wide range of applications in a number of industries. It is a highly sought aftercomponent for its ability to quickly clamp voltage at safe levels, preventing expensiveelectronic equipment from being damaged due to transient voltage.

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