1N5258A

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The 1N5258A is a small signal Zener diode designed for high frequency operation. It is a single diode with a relatively low forward voltage drop, designed to operate over a wide range of temperatures and provide reliable, high-performance protection from transient electrical overvoltage.

The 1N5258A’s application field is extensive. It is well suited for ESD protection, lighting power modules and low power applications, like audio/video receivers. It is also used in automotive, medical and consumer electronic equipment, used within these applications as voltage regulator, rectifiers, temporary overload protection and surge suppression devices.

From a functional standpoint, the 1N5258A works as follows. When the device is exposed to an applied voltage that exceeds the device’s breakdown voltage, current flows and the device is said to be in Zener conduction. The voltage across the device remains relatively constant and is called the Zener voltage. Because of its architecture and design the 1N5258A provides a low forward voltage drop, assisting in maintaining the device’s Zener voltage.

The 1N5258A is built with an anode as the cathode. An external source of positive voltage is applied to the anode, resulting in a positive voltage between the anode and the cathode. At low voltage levels, the voltage drop across the anode and cathode is constant, providing instant, reliable protection from transient electrical overvoltage. As the applied voltage increases, the diode’s Zener voltage increases too.

The current through the 1N5258A is determined by the amount of resistance in the circuit and the voltage that is applied to the diode. A higher resistance will reduce the current, and vice versa. The voltage at the anode can be lowered with a resistor, allowing the 1N5258A to be used in an adjustable voltage regulator circuit.

The 1N5258A is a very useful device, offering extremely low forward voltage drop, fast switching and outstanding reliability. The device’s wide temperature range and its ability to efficiently provide protection from transient overvoltage make it an excellent choice for a wide range of applications.

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