PN Junction Diode
Product Code : SCL-EAE-11361
The PN Junction Diode Apparatus provides a structured platform for applying a controlled DC voltage to a semiconductor diode. Students record the corresponding current at different voltage levels and use the readings to plot the forward- and reverse-bias V-I characteristic curves.
The apparatus supports practical semiconductor teaching by organising the diode circuit and connection points on an accessible educational unit. Its exact voltage range, current range, panel construction, meter arrangement and power requirements must be ed against the final Lab Exports technical quotation.
Key Features
Forward-bias study: Demonstrates how diode current changes as the applied forward voltage increases.
Reverse-bias study: Supports observation of reverse current within the verified operating range.
V-I characteristic plotting: Provides paired voltage and current readings for graphical analysis.
Hands-on semiconductor learning: Connects PN junction theory with observable circuit behaviour.
Organised experiment layout: Keeps the diode connections and measuring points accessible during practical work.
Classroom demonstration value: Helps teachers explain polarity, biasing and current direction step by step.
Institutional use: Suitable for supervised school, college and introductory electronics laboratories.
Technical Specifications
|
Specification |
Detail |
|
Product Name |
PN Junction Diode |
|
Brand |
Lab Exports |
|
Product Code |
SCL-EAE-11267 |
|
Product Category |
Physics Laboratory Equipment – Electrical and Electronics Apparatus |
|
Intended Users |
Schools, colleges, polytechnics, technical institutes, teachers and electronics students |
|
Experiment Principle |
Forward- and reverse-bias V-I characteristics of a PN junction diode |
Applications / Uses
Plotting the forward-bias V-I characteristic curve.
Observing reverse-bias diode behaviour.
Identifying the forward conduction or knee-voltage region.
Teaching anode, cathode and diode polarity.
Comparing current flow under forward and reverse bias.
Supporting semiconductor physics and introductory electronics practicals.
Complementing electrical and electronics laboratory equipment.
How to Use the PN Junction Diode
Place the apparatus on a stable, dry laboratory bench.
Identify the diode terminals, measuring points and adjustment controls.
Set the adjustable supply or control to its minimum position.
Connect the diode in forward bias using the supplied circuit diagram.
Increase the voltage gradually and record the corresponding current.
Return the control to minimum and switch off the apparatus.
Reconnect the diode in reverse bias.
Record reverse-bias readings only within the specified limits.
Plot current against voltage and compare both curves.
Safety note: Change connections only when the power is switched off. Do not exceed the verified voltage, current or diode ratings. Use the apparatus under qualified teacher or laboratory supervision.
Care & Maintenance
Clean the panel with a soft, dry cloth.
Keep liquids and conductive debris away from terminals and controls.
Return adjustable controls to minimum after each experiment.
Store the unit and leads in a dry, dust-free cabinet.
Why Choose Lab Exports
Lab Exports manufactures, supplies and exports scientific laboratory instruments, experiment setups, science kits, mathematics kits, didactic models and STEM equipment. Its catalogue serves schools, colleges, universities and technical institutes. Buyers can specifications, accessories, private labelling, packing and export requirements through an itemised quotation before ordering.
Frequently Asked Questions
What is a PN junction diode apparatus used for?
It is used to measure and plot the relationship between diode voltage and current under forward- and reverse-bias conditions.
What happens when a PN junction diode is forward biased?
Forward bias reduces the junction barrier. The current rises significantly when the diode enters its conduction region.
What happens when the diode is reverse biased?
A small reverse current normally flows within the safe operating region. The verified reverse-voltage rating must not be exceeded.
Can students plot a V-I characteristic curve?
Yes. Students record corresponding voltage and current readings and plot current on the vertical axis against voltage on the horizontal axis.
Is the apparatus suitable for school laboratories?
Yes. It supports supervised semiconductor demonstrations, physics practicals and introductory electronics experiments.
Are meters and connecting leads included?
The supplied meter configuration and accessories are not stated in the public listing. the complete kit contents before ordering.
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