TZMC4V7-M-18

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The TZMC4V7-M-18 is a precision integrated circuit zener diode designed to provide a stable reference to ensure a fixed output voltage for a power supply. It is perhaps the most commonly used type of diode for the task of voltage stabilisation because of its superior dynamic voltage stability when compared to other types of diodes, such as the standard Schottky diode or the light dependent diode. In addition, TZMC4V7-M-18 diodes have a lower forward voltage drop than most other diodes, meaning that they consume less power and produce less heat.

The primary use of the TZMC4V7-M-18 diode is as a voltage regulator, where the diode is used to provide a stable reference to ensure a fixed output voltage for a power supply. When coupled with a matching resistor, the diode is able to accurately stabilise the output voltage of the power supply, and can do so at a much lower power input than would be possible with a regular Schottky or light dependent diode. The stability of the TZMC4V7-M-18 diode makes it a good choice for applications where power supply noise is an important consideration, such as analogue and digital communication links.

The working principle of the TZMC4V7-M-18 diode is based on its Zener voltage, which is defined as the voltage at which the diode begins to conduct in reverse bias (also known as breakdown voltage). The Zener voltage of the TZMC4V7-M-18 is 4.7V, which is below the lower limit of the safe operating region (7V). Therefore, when the voltage applied to the diode is above the Zener voltage, a current will begin to flow from the cathode to the anode. Since the voltage across the diode is limited to the Zener voltage, the output voltage remains constant regardless of the input voltage. As a result, the TZMC4V7-M-18 can accurately regulate the output voltage of the power supply despite fluctuations in the input voltage.

In addition to the use of the TZMC4V7-M-18 for voltage regulation, the diode can also be used for general purpose clamping applications. When the diode is placed in parallel with an external circuit, it can provide a fast response to current surges, as the diode will “clamp” the voltage to the Zener voltage. This can be useful in applications such as surge protection or EMI suppression, where it can prevent the external circuit from being damaged by an unexpected surge.

The TZMC4V7-M-18 diode is a highly accurate and versatile voltage regulator that provides an ideal solution for applications requiring stability over a wide range of input voltages. With its low power consumption and tight Zener voltage tolerance, the diode is highly reliable and suitable for applications in which power supply noise is a critical factor. As a result, the TZMC4V7-M-18 is a popular choice for use in a wide range of electronic applications.

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