Transistor Characteristics
Product Code : SCL-EAE-11319
Quick answer: The Transistor Characteristics apparatus is a common-emitter NPN trainer panel with four analog meters, a built-in power supply and variable voltage controls. Students plot the input characteristic (IB against VBE) and output characteristics (IC against VCE), identify cutoff, active and saturation regions and estimate current gain. Lab Exports manufactures it in Delhi for schools, colleges and universities.
Specifications
| Parameter | Detail |
|---|---|
| Transistor configuration | Common-emitter, NPN type |
| Measurement | Four analog meters for voltage and current |
| Power | Built-in power supply |
| Controls | Variable voltage controls |
| Connections | Panel-mounted, colour-coded terminals |
| Panel | Printed circuit diagram linked to the terminals |
Connecting leads and an experiment manual can be included as agreed in the quotation.
How the transistor characteristics experiment is done
In the common-emitter connection the base-emitter junction is the input and the collector-emitter path is the output. The four meters read base current IB, base-emitter voltage VBE, collector current IC and collector-emitter voltage VCE, and the two variable supplies set the base and collector voltages independently.
- Set both variable voltage controls to minimum and check the printed circuit, terminals and meter connections.
- For the input characteristic, hold VCE at a fixed value and raise VBE in small steps, recording IB each time.
- For the output characteristics, set IB to a fixed value and raise VCE from zero, recording IC; repeat for several values of IB.
- Return both controls to minimum before switching off.
The input curve resembles a forward-biased diode curve. The output curves rise steeply at low VCE (saturation) and then flatten (active region), where IC is set mainly by IB. The current gain is beta = IC / IB, or more exactly delta IC / delta IB at constant VCE, and the input resistance is delta VBE / delta IB.
Key features
- Common-emitter NPN circuit for the standard textbook experiment
- Four analog meters for input and output voltages and currents
- Built-in power supply reduces the need for separate supplies
- Variable voltage controls to set the operating point gradually
- Printed circuit diagram linked to the panel terminals
- Colour-coded terminals for clear, correct connections
Documentation and supply
Most Lab Exports products carry a one-year manufacturer warranty.
Lab Exports manufactures the transistor characteristics 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 graphs are plotted with the transistor characteristics apparatus?
The input characteristic, IB against VBE at constant VCE, and a family of output characteristics, IC against VCE at several fixed values of IB.
How is current gain found from the readings?
From the output characteristics, take the change in IC between two curves at the same VCE and divide by the change in IB: beta = delta IC / delta IB.
What is the price of the transistor characteristics apparatus?
Prices are not published on the website. Add the transistor characteristics apparatus to the Enquiry Cart with the Add To Cart button on this page, or email [email protected] with the house code SCL-EAE-11319 and the quantity, to receive a quotation.
Does Lab Exports manufacture the transistor characteristics apparatus?
Yes. Lab Exports manufactures the transistor characteristics apparatus at its works at 11/315, Lalita Park, Laxmi Nagar, Delhi 110092, under house code SCL-EAE-11319.
Request a quote
Email [email protected] with the house code SCL-EAE-11319 and the quantity, or add the transistor characteristics apparatus to the Enquiry Cart with the Add To Cart button on this page. Tender buyers can also see the Tenders and OEM page.
