Description:
Zener Diodes are like a regular diode but let current flow in reverse if the Zener voltage is reached.
(In other words!) A Zener diode allows current to flow backwards through it if a certain voltage is reached.
How it works:
This device contains semiconductor material that conducts electricity in one direction, but almost completely blocks flow in the opposite direction, unless a certain voltage is exceeded.
Connect it:
A Zener diode has two wire leads, and should be connected in series with the device it's meant to support. Diodes are polarized, which means they each have a positive and negative pole that must be connected in a certain way.
How it is used:
Diodes are used in rectification circuits to convert AC to DC. They are also used in logic gates and signal processing. Zener diodes are used as voltage regulators by conducting in the reverse direction once their Zener voltage is reached, clamping the voltage in the circuit.
Select the device to edit its name and Zener voltage.
Get Started:
Drag the starter circuit below into your design for a working example of how to use this part.
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More About Zener Diode:
To use a Zener Diode in Tinkercad, select the Zener Diode component from the components menu, then customize its Name & Zener Voltage value in the properties panel to simulate your circuit.
Reverse bias a diode and it won't pass current. Forward bias it and it will pass current. The stripe indicates the cathode terminal which must connect to the negative terminal of the battery.
A Zener diode is a type of diode designed to allow current to flow in both directions, but with a unique feature—it permits reverse current to flow once a specified Zener voltage is reached. These diodes are primarily used for voltage regulation and clipping circuits, providing a stable reference voltage by maintaining a constant voltage once the reverse bias exceeds the Zener voltage. The key specifications of a Zener diode include its Zener voltage (measured in volts (V)), which determines the voltage at which the diode starts to conduct in reverse bias. Zener voltages are typically available in a range from 2.4V to over 200V, depending on the application. Another important specification is the current rating, measured in amperes (A) or milliamperes (mA), which indicates the maximum reverse current the diode can handle without damage. The power rating, measured in watts (W), is a crucial factor and indicates the maximum power the diode can dissipate without overheating, typically ranging from 0.5W to 5W for most general-purpose Zener diodes. Dynamic resistance (in ohms (Ω)) is also an important characteristic, representing the diode's resistance to changes in voltage when operating in the breakdown region. Zener diodes have a tolerance that typically ranges from ±5% to ±20%, indicating the precision of the Zener voltage. They are commonly used in voltage regulation circuits, where they stabilize the output voltage despite variations in input voltage or load conditions. Zener diodes are also used in surge protection and clipping circuits, providing protection by clamping the voltage within a safe range.
Recommended Websites for Learning About Zener Diode:
1. Website Title: Electronics Tutorials – Zener Diode
Website Page URL: https://www.electronics-tutorials.ws/diode/zener-diode.html
URL recommended for (Reason): This tutorial provides a comprehensive guide on how Zener diodes work, their applications in voltage regulation, and key parameters like Zener voltage, current rating, and power dissipation. Ideal for beginners.
2. Website Title: All About Circuits – Zener Diode
Website Page URL: https://www.allaboutcircuits.com/textbook/semiconductors/zener-diode/
URL recommended for (Reason): Offers a textbook-style breakdown of Zener diodes, their characteristics, voltage regulation, and application examples in reverse bias. Excellent for learners seeking an in-depth understanding of their working principles.
3. Website Title: SparkFun – Zener Diodes Overview
Website Page URL: https://learn.sparkfun.com/tutorials/zener-diodes/all
URL recommended for (Reason): A practical guide on how to use Zener diodes in electronic projects, including voltage regulation, clipping circuits, and simple hands-on examples. Perfect for makers and hobbyists looking to experiment with Zener diodes.
4. Website Title: Digi-Key – Zener Diodes Selection Guide
Website Page URL: https://www.digikey.com/en/resources/diodes/zener-diodes
URL recommended for (Reason): This page provides a detailed selection guide for Zener diodes, covering various models, specifications (Zener voltage, power rating), and links to datasheets. It’s especially useful for understanding how to choose the right Zener diode for your design needs.
5. Website Title: Electronics Hub – Zener Diodes
Website Page URL: https://www.electronicshub.org/zener-diode/
URL recommended for (Reason): Explains the working principle, types, and applications of Zener diodes in an easy-to-understand format. Includes practical examples for beginners and is a good reference for understanding reverse breakdown behavior.
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