Capacitance Substitution Box Manufacturer,Supplier and Exporter in India

Capacitance Substitution Box (Product Code: SLE/PHY/145) is a switch-selected capacitor box used to insert a known capacitance into a circuit for RC timing, filter and AC reactance experiments in physics and electronics labs. A rotary selector switch chooses preferred values from 100 pF to 1 µF, each within ±5% and rated at 63 V, through two 4 mm safety sockets on a 75 x 100 x 40 mm ABS case. It is supplied by Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, India.

Specifications

What Is a Capacitance Substitution Box Used For?

Instead of soldering individual capacitors, students turn the selector to swap values and see at once how capacitance changes the time constant of an RC circuit, the cut-off point of a simple filter, or the reactance of a capacitor in an AC circuit driven by a signal generator and viewed on an oscilloscope. That flexibility makes it a useful part of any AC DC circuits experiment kit at college level.

Because the values run from picofarads to one microfarad, the box suits signal-frequency work; slow charge-and-discharge demonstrations read on a meter usually use larger capacitors. Keep the applied voltage below the 63 V rating, switch the supply off before changing value, and connect with shrouded 4 mm leads.

What to Specify When Ordering

• The number of capacitance substitution boxes needed.
• Whether a resistance substitution box should be quoted for RC work.
• Whether a signal generator and oscilloscope are also required.
• Connecting leads with 4 mm plugs for the safety sockets.

Supplier

ScienceLab is the trading name of Jain Scientific Equipments Private Limited, which supplies this capacitance substitution box from Ambala, Haryana, for physics and electronics laboratories. Institutional and tender buyers who need vendor registration details can use GSTIN 06AAECJ8618A1ZT and LEI 3358004HRD1JIVXKYX49. Background on the company is on the ScienceLab profile page.

Related Physics Lab Equipment

Instruments used with a capacitance box in circuit experiments:

• Resistance Substitution Box — switch-selected resistors to pair with the capacitors in RC circuits.
• Signal Generator and Amplifier — AC source for reactance and filter experiments.
• Oscilloscope Dual Trace — displays charging curves and phase differences.
• Advanced Digital Multimeter — measures circuit voltages and currents.
• Stackable Leads — 4 mm leads for the safety sockets.

Browse all Physics Lab Equipment for further electricity apparatus.

Frequently Asked Questions

What capacitance values does the Capacitance Substitution Box provide?
The Capacitance Substitution Box selects 100 pF, 220 pF, 470 pF, 2.2 nF, 4.7 nF, 10 nF, 22 nF, 47 nF, 100 nF, 220 nF, 470 nF and 1 µF, a set of preferred values chosen with its rotary switch.

What are the accuracy and voltage rating of the Capacitance Substitution Box?
Every value in the Capacitance Substitution Box has an accuracy of ±5% and a rating of 63 V. Keep circuit voltages below that rating, and allow for the ±5% tolerance when comparing measured time constants with calculated ones.

How is the Capacitance Substitution Box connected to a circuit?
The Capacitance Substitution Box connects through two 4 mm safety sockets on its ABS case, so standard 4 mm plug leads fit directly. The selected capacitor appears between the two sockets as soon as the rotary switch is turned.

Can the Capacitance Substitution Box be used for RC time-constant experiments?
Yes, the Capacitance Substitution Box can be combined with a resistor or resistance box for RC experiments. With its picofarad-to-microfarad values the time constants are short, so a signal generator and oscilloscope are the usual way to observe them.

Is a calibration certificate available for the Capacitance Substitution Box?
A calibration certificate is not listed for the Capacitance Substitution Box. If your tender or quality system asks for calibration documents, please raise it through the contact page before ordering so we can confirm what is possible.

Who supplies the Capacitance Substitution Box?
The Capacitance Substitution Box is supplied by Jain Scientific Equipments Pvt Ltd (ScienceLab), Ambala, Haryana, India. Schools, colleges, universities, dealers and importers can order it alongside resistance boxes, meters and signal sources.

What should a Capacitance Substitution Box quotation request include?
For a Capacitance Substitution Box quotation, give the product code SLE/PHY/145, the quantity, any companion instruments or leads you want quoted, and your delivery address in India or abroad.

Request a Quote

Ask for a price on the Capacitance Substitution Box through the contact page or add it to the enquiry cart with your other electricity items.

Last updated: 24 September 2026