Power Supply Variable Manufacturer,Supplier and Exporter in India

Power Supply Variable (Product Code: SLE/PHY/272) is a continuously variable AC/DC power supply unit for lab demonstrations and advanced-level student experiments in college and senior school physics. A rotary knob sets the output anywhere from 0 to 25 V at a combined current of up to 8.5 A, and the voltage is shown on a bright green 12.5 mm LED display. It is supplied by Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, India.

Specifications

What Is the Variable Power Supply Used For?

Because the voltage can be wound up smoothly from zero, the unit suits experiments in which a quantity must change in small, even steps: current-voltage graphs for resistors, lamps and diodes, the heating effect of a current, or electromagnets and coils run at a controlled level. The combined 8.5 A rating leaves headroom for low-resistance loads such as heating elements, and the AC or DC output lets one unit serve both rectifier and transformer demonstrations.

Start each experiment with the knob at zero and raise the voltage while watching the display. If the protection trips, clear the fault and reset the unit rather than switching it on and off repeatedly; the microprocessor trip is designed to tell a brief surge, such as a cold lamp filament switching on, from a genuine short circuit. The fanless design also keeps the room quiet during a demonstration.

What to Specify When Ordering

• Number of units: for example one per demonstration bench or per student group in advanced-level practicals.
• Meters, leads or loads to be quoted with the power supply.
• The mains supply at your site, so we can confirm the unit matches it before dispatch.

Supplier

Jain Scientific Equipments Private Limited, trading as ScienceLab, supplies the Power Supply Variable from Ambala, Haryana, India. The company sources this bench power supply for its physics range and quotes it to colleges, schools, training institutes, dealers and importers in India and international markets. For tender and vendor registration, the supplying company’s details are GSTIN 06AAECJ8618A1ZT and LEI 3358004HRD1JIVXKYX49. More about the company is on our profile page.

Related Physics Lab Equipment

Equipment commonly used with a variable bench supply:

• Power Supply, Smoothed — a stepped supply with smoothed output for electronics circuits.
• Ammeter Voltmeter — reads current and voltage in the powered circuit.
• Stackable Leads — connecting leads for bench circuits.
• Potentiometer Module — a variable resistor module for current-control experiments.
• High Tension Power Supply — an alternative for experiments that need higher voltages.

Find more meters and supplies in the Physics Lab Equipment category.

Frequently Asked Questions

What voltage and current does the Power Supply Variable provide?
The Power Supply Variable gives a continuously variable output from 0 to 25 V, set with a rotary knob, at a continuously rated combined current of 8.5 A. The output can be AC or DC, and the DC is smoothed by an internal 2200 µF capacitor.

How is the output voltage of the Power Supply Variable displayed?
The Power Supply Variable shows its output voltage on a bright green 12.5 mm LED digital display. A toggle switch selects whether the display reads the AC or the DC voltage, so students can check the setting at a glance before connecting a load.

How is the Power Supply Variable protected against short circuits?
The Power Supply Variable has a high-speed, resettable, microprocessor-controlled trip on the secondary that tells a real short circuit from a temporary current surge. The primary is protected by a slow-blow fuse and the transformer by a thermal fuse.

Does the Power Supply Variable have a cooling fan?
No. The Power Supply Variable uses heavy-duty 40 A Schottky barrier diodes for rectification and a high-performance toroidal transformer, which reduce weight and wasted power and remove the need for a noisy cooling fan during lessons.

What are the size and weight of the Power Supply Variable?
The Power Supply Variable measures 300 x 115 x 155 mm (W x D x H) and weighs 5.5 kg, a bench-top size that fits beside demonstration apparatus or on a student workstation in an advanced-level physics laboratory.

Is a calibration certificate available for the Power Supply Variable?
Calibration-certificate availability for the Power Supply Variable should be discussed with us before ordering. Explain through the contact page what the display reading needs to be checked against and why, and we will tell you what can be provided.

Who supplies the Power Supply Variable?
The Power Supply Variable is supplied by Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, Haryana, India. The company sources the unit and quotes it to colleges, schools, dealers and importers in India and international markets.

Request a Quote

Request a Power Supply Variable quotation through our contact page, or add it to the enquiry cart together with meters and leads. Include the quantity and delivery location so the quote covers everything you need.

Last updated: 24 September 2026