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NPN Transistor
NPN Transistor (Product Code: SCL-439/116) is a bipolar junction transistor used to demonstrate switching and amplification in school, college and hobby electronics labs. Students use it in amplifier circuits, mini and major electronics projects and DIY builds, and it is listed with a maximum power dissipation of 625 mW and a collector current of 0.6 A. It is supplied by Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, India, alongside its physics lab equipment for India and international markets.
Specifications
| Parameter | Detail |
|---|---|
| Type | NPN bipolar junction transistor |
| Values | Different values available |
| Maximum power dissipation | 625 mW |
| Collector current | 0.6 A (600 mA) |
| Suited to | Circuits needing a low-current, high-speed transistor; amplifier, project and DIY work |
| Product code | SCL-439/116 |
| Supplied by | Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, India |
What Is the NPN Transistor Used For?
In an NPN transistor a small current flowing into the base controls a much larger current between collector and emitter. That behaviour lets students build a simple amplifier, use the transistor as an electronic switch for a lamp or relay, and plot input and output characteristics in the common-emitter configuration, a standard senior-secondary practical. Its listed rating suits the low-current, high-speed circuits used in electronics projects.
When wiring the circuit, identify the emitter, base and collector from the pin diagram for the value supplied, always place a resistor in the base lead, and keep collector current and power well inside the 0.6 A and 625 mW limits. Readings taken with a milliammeter and voltmeter at small steps give smooth characteristic curves for the practical record.
What to Specify When Ordering
- Transistor value: state the value or type number your circuit diagram specifies, as the NPN Transistor is offered in different values.
- Quantity: pieces per student group, with spares for project work.
- Complementary type: say if PNP transistors are also needed.
- Bench items: meters and a DC source to be quoted along with it.
Supplier
Jain Scientific Equipments Private Limited, known by its trading name ScienceLab, supplies the NPN Transistor from Ambala, Haryana, to schools, engineering colleges, polytechnics, project students and dealers in India and international markets. Transistor orders are often combined with resistors, meters and power sources, so a whole electronics bench can be quoted at once. The ScienceLab company profile has more about the company.
Related Physics Lab Equipment
Pair the NPN transistor with these items for characteristic curves and project circuits:
- PNP Transistor — the complementary type for push-pull and comparison experiments.
- Transistor (for high school) — another transistor listing for school-level demonstrations.
- Carbon Resistance of Different Values — base and load resistors for the circuit.
- Milliammeter — measures base and collector current.
- Battery Eliminator 12 Volt — DC supply for the transistor bench.
More apparatus for school practicals is listed under Physics Lab.
Frequently Asked Questions
What are the ratings of the NPN Transistor?
The NPN Transistor (SCL-439/116) is listed with a maximum power dissipation of 625 mW and a collector current of 0.6 A. Keep your circuit well inside these limits and use a base resistor to protect the transistor during experiments.
Is the NPN Transistor available in different values?
Yes, the NPN Transistor is offered in different values. Quote the value or type number shown in your circuit diagram when you enquire, so that the transistor supplied matches your practical or project.
What is an NPN transistor used for in the lab?
An NPN Transistor is used as an amplifier, as an electronic switch and for plotting common-emitter characteristics. It also suits electrical and electronic mini or major projects and DIY builds where a low-current, high-speed transistor is needed.
What is the difference between an NPN and a PNP transistor?
An NPN Transistor switches on when its base is made positive relative to the emitter, while a PNP transistor switches on with a base more negative than its emitter. Supply polarities are therefore reversed between the two types.
Who supplies the NPN Transistor?
The NPN Transistor is supplied by Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, Haryana, India, a supplier that engineering colleges, polytechnics and project students use for transistors together with meters and power sources.
Can the NPN Transistor be ordered in bulk?
Bulk orders of the NPN Transistor can be quoted for labs, training centres and dealers. Send the transistor value, total quantity and delivery location through the contact page or enquiry cart to receive a quotation.
Request a Quote
Ask for an NPN Transistor quotation through the contact page, giving the value and quantity, or add it to your enquiry cart with any resistors and meters you need.
Last updated: 24 September 2026
