ZM4730A-13

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A ZM4730A-13 diode is a single type Zener diode with an anode and a cathode. It is often used to protect circuits from too high voltage or to provide a low voltage reference point from which to measure signal levels. The ZM4730A-13 is a voltage regulator diode typically used to regulate the voltage between two points. It belongs to a family of Zener diodes, which use a reverse breakdown voltage to regulate the current in the opposite direction.

Typically, a Zener diode is a two-terminal diode that normally carries a very small forward current and its reverse breakdown voltage is determined by its manufacturing process. Its current-voltage characteristic is usually represented by a diode curve. This plot shows how the reverse current of the diode varies as the voltage changes over its operating voltage range.

The Zener diode is mostly used in applications where the cathode is connected to the higher voltage, so that when the voltage rises above the Zener voltage, it causes a current to flow, which keeps the voltage across the diode at the Zener breakdown voltage. The ZM4730A-13 Zener diode features a 2.7V breakdown voltage, allowing it to be used as a voltage regulator in linear circuits. The Zener voltage is given by the Zener diode\'s unique reverse breakdown voltage.

In a typical application, the ZM4730A-13 diode is connected in series with a resistor to form a voltage divider. The voltage across the Zener diode is set to the Zener breakdown voltage and the resistor is adjusted to control the current, so that the voltage remains constant regardless of changes in the input voltage. This is done by adjusting the resistor so that just enough current passes through the diode to keep the voltage at the breakdown voltage. When an excessive voltage is applied to the diode, the current increases and the diode breaks down, which limits the voltage.

The Zener diode also acts as a voltage-reference source. The Zener voltage is used to monitor the incoming power supply and provide a stable reference voltage for comparing incoming signals. The diode is also frequently used for voltage-regulation purposes, such as in a regulator circuit. The voltage-regulator circuit uses the Zener diode to keep the output voltage at a constant level, regardless of any changes in the input voltage.

The main benefit of a Zener diode is that it can be used for applications requiring signal regulation even when the input voltage can change significantly over time. By adjusting the resistor in the voltage divider, the output voltage can remain constant and unaffected by any sudden changes to the input. This is especially useful in applications where the output voltage must remain stable over a large range of input voltage changes such as in portable electronics where the battery voltage may change as it is being drained.

In summary, the ZM4730A-13 diode is a commonly used Zener diode that can be used for a variety of different applications. Its reverse breakdown voltage allows it to be used to regulate voltage, act as a voltage reference source and protect the circuit from excessive voltage changes. Its ease of use, relatively low cost and reliable performance make it a popular choice for many applications.

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