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LED
LED (Product Code: SCL-445/119) is a 5 mm light-emitting diode mounted on a board, used as a low-power indicator lamp in school circuits, physics practicals and science models. Students and teachers use it as an alternative to filament bulbs and to add colour to working models and projects. It is supplied by Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, India, for both single-bench orders and school lab equipment bulk supply.
Specifications
| Parameter | Detail |
|---|---|
| Component | Light-emitting diode (LED) |
| Size | 5 mm |
| Mounting | On board |
| Typical use | Alternative to bulbs; adds colour to models |
| Product code | SCL-445/119 |
| Supplied by | Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, India |
What Is the LED Used For?
An LED glows only when current flows through it in the forward direction, so it works both as a light source and as a polarity indicator. In class it replaces a torch bulb in simple circuits, shows whether a switch or logic output is on, and demonstrates that a diode conducts one way only. In science fair models it adds coloured lighting with little heat and a small current draw.
Always connect the LED through a series resistor, because an LED placed straight across a cell or supply can pass too much current and fail. Identify the anode (positive) and cathode before connecting; a reversed LED simply stays dark, which is itself a useful lesson in polarity. Mounting the 5 mm LED on a board keeps this small component easy to handle and reuse across many practical sessions.
What to Specify When Ordering
- Number of board-mounted 5 mm LEDs per bench or per model.
- Whether loose LEDs, such as the separate white 5 mm listing, suit your project better than the board-mounted version.
- Any resistors, switches or power sources to include in the same quotation.
Supplier
Jain Scientific Equipments Private Limited, whose trading name is ScienceLab, supplies the board-mounted LED from Ambala, Haryana, to schools, hobby and model-making centres, colleges and dealers in India and international markets. Teachers building circuit kits often combine LEDs with cells, switches and resistors in one order. Find out more on the ScienceLab company profile.
Related Physics Lab Equipment
Items that complete a simple LED circuit or model:
- LED, 5 mm, White — a separate LED listing for white light.
- Simple Circuit Module LED Board Red — module version for modular circuit kits.
- Carbon Resistance of Different Values — the series resistor that limits LED current.
- Electric Switch — turns the LED circuit on and off.
- Connecting Wire — links the LED board to the cell or supply.
Browse more apparatus in the Physics Lab category.
Frequently Asked Questions
What size is the LED?
The LED (SCL-445/119) supplied by ScienceLab is a 5 mm light-emitting diode that comes mounted on a board, so students can handle and connect it easily in classroom circuits and science models.
Why use an LED instead of a bulb in school circuits?
An LED is a practical alternative to a filament bulb because it draws little current and runs cool, and it lights in one direction only, which also teaches diode behaviour. It is especially useful for adding colour to models.
Does the LED need a resistor?
Yes. The LED should always be connected through a suitable series resistor, because connecting it directly across a cell or supply can pass too much current and damage it. Choose the resistor value to match your supply voltage.
What can the LED be used for in models?
The 5 mm LED on board lights up signals, model houses, traffic-light displays and other working projects, adding colour to science fair models, and it serves as an indicator lamp in classroom circuits and logic demonstrations.
Who supplies the LED?
The board-mounted LED is supplied by Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, Haryana, India, which also supplies the resistors, switches and connecting wire needed to turn it into a working circuit.
How do I order the LED in quantity?
To order the LED in quantity, send the code SCL-445/119, the number of pieces and your delivery location through the contact page or enquiry cart. Add resistors, switches or cells to the same enquiry if needed.
Request a Quote
Place the LED in the enquiry cart with your other circuit items, or write to us through the contact page with the quantity required.
Last updated: 24 September 2026
