Zener Diode Apparatus
Product Code : SCL-EAE-11322
Quick answer: The Zener Diode Apparatus is a semiconductor practical set for plotting the forward and reverse V-I characteristics of a Zener diode, locating its breakdown voltage and demonstrating basic shunt voltage regulation. Students also compare Zener and ordinary PN junction behaviour. Lab Exports manufactures it in Delhi for schools, colleges and universities.
Specifications
| Parameter | Detail |
|---|---|
| Device studied | Zener diode |
| Apparatus type | Semiconductor characteristics apparatus |
| Primary experiments | Forward characteristics, reverse breakdown and basic voltage regulation |
| Readings taken | Diode voltage and diode current for V-I curve plotting |
| Brand | Lab Exports |
How the Zener diode experiment is done
A Zener diode conducts like an ordinary silicon diode when it is forward biased. In reverse bias only a tiny leakage current flows until the applied voltage reaches the Zener (breakdown) voltage Vz; beyond that point the reverse current rises sharply while the voltage across the diode stays almost constant. That near-constant voltage is what makes the Zener diode useful as a simple voltage reference and regulator.
With this apparatus students take readings in both directions, draw the complete V-I characteristic on one graph and read off the approximate breakdown voltage. With a current-limiting series resistor in circuit, the same diode can be shown holding the output voltage steady while the input voltage changes, which is the basic shunt regulator.
- Identify the diode polarity, the series current-limiting resistance and the measurement points on the apparatus.
- For forward bias, raise the supply in small steps and record diode voltage and current at each step.
- Reverse the connections and increase the reverse voltage slowly, noting where the current begins to rise steeply.
- Take several readings beyond breakdown while keeping the current within the diode rating.
- Plot forward and reverse readings on one set of axes and mark the Zener voltage on the graph.
The forward curve looks like that of a normal silicon diode, while the reverse curve becomes almost vertical after breakdown. Comparing the two with a conventional PN junction diode shows students why the Zener diode, and not the ordinary diode, is used as a voltage reference.
Key features
- Covers forward-bias study of the Zener diode as well as the reverse-breakdown region
- Readings of voltage and current can be recorded and graphed to draw the full V-I curve
- Demonstrates basic Zener shunt-regulator operation with a suitable series resistor
- Polarity, series resistance and measurement points are easy for students to identify
- Suitable for supervised demonstrations and repeated student practical sessions
Documentation and supply
Most Lab Exports products carry a one-year manufacturer warranty.
Lab Exports manufactures the Zener Diode Apparatus at its works in Laxmi Nagar, Delhi, and supplies it to schools, colleges and universities in India and 60+ countries, handling the export documents for each shipment. More about the company is on the About Lab Exports page.
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The full range is in the Electrical and Electronics section of the Physics Lab range.
Frequently asked questions
What does the Zener diode apparatus demonstrate?
It demonstrates the forward and reverse V-I characteristics of a Zener diode, the approximate breakdown (Zener) voltage and the principle of simple shunt voltage regulation.
Why is a series resistor used in the Zener diode experiment?
Beyond breakdown the reverse current rises very steeply, so a current-limiting resistor keeps the current within the diode rating and allows the regulating action to be observed safely.
What is the price of the Zener Diode Apparatus?
Prices are not published on the website. Add the Zener Diode Apparatus to the Enquiry Cart with the Add To Cart button on this page, or email [email protected] with the house code SCL-EAE-11322 and the quantity, to receive a quotation.
Does Lab Exports manufacture the Zener Diode Apparatus?
Yes. Lab Exports manufactures the Zener Diode Apparatus at its works at 11/315, Lalita Park, Laxmi Nagar, Delhi 110092, under house code SCL-EAE-11322.
Request a quote
Email [email protected] with the house code SCL-EAE-11322 and the quantity, or add the Zener Diode Apparatus to the Enquiry Cart with the Add To Cart button on this page. Tender buyers can also see the Tenders and OEM page.
