Z4KE170AHE3/73

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The Z4KE170AHE3/73 is a high-performance, high-voltage, high-speed and low-power, single Zener diode. It\'s specifically designed to provide improved performance in Zener diode applications, which includes consistent electrical performance over a wide range of junction temperature and more accurate Zener voltage trim. It typically operates in a single on-off mode.

The Z4KE170AHE3/73 is suitable for applications such as high-current surge suppression, back-up protection, circuit clamping, noise elimination, stability control, and signal modulation. It is especially advantageous for dealing with the lightning surge in LED lighting. The low reverse leakage current makes the diode suitable for use in applications requiring extremely low current leakage, such as in hybrid or active noise canceling headsets.

The operation of the single Zener diode is based on the principles of thermionic emission and negative resistance region. When the diode is reverse biased, the electric field created between the cathode and anode causes electrons to leave their orbits and travel to the anode. As the electrons travel, they form electron-hole pairs which allow for the current flow. This current flow is known as the Zener current.

As the Zener current increases, the electric field created between the electrodes increases. This creates a greater thermionic emission and the current increases exponentially, resulting in an avalanche effect. At this point, the voltage at the Zener diode remains constant while the current continues to rise, creating a highly stable reverse biased conduction. This drop in voltage is called the Zener voltage or avalanche voltage.

The Z4KE170AHE3/73 Zener diode has been designed for enhanced reliability in long-term operation. It is fabricated using a unique laser-trimmable process which ensures precise Zener voltage trim, and the design includes a high temperature oxide passivation which offers improved electrical performance and robustness. It also has an integrated metallurgically-bonded self-limiting anode layer which helps to suppress the occurrence of zener cascade.

The Z4KE170AHE3/73 is also capable of dissipating relatively high power, so it is suitable for use in lighting and other power consuming applications. It also comes with an optional external resistor, which helps to limit the Zener current and prevent the diode from being overloaded, thus increasing its reliability and long-term performance.

The Z4KE170AHE3/73 single Zener diode offers improved performance and reliability in a wide range of applications. Its high-voltage, low-leakage, and low-power capabilities make it an ideal choice for many applications where accuracy and consistency are essential. This diode is also very suitable for dealing with lightning surge in LED lighting, and its integrated metallurgically-bonded self-limiting anode layer increases its reliability and operational life.

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