Capacitance Substitution Box
Product Code : LSK-PL-10334
Capacitance Substitution Box (SKU LSK-PL-10334) is a switched capacitor box that lets students select preferred capacitance values from 100 pF to 1 µF with a single rotary switch, instead of wiring loose capacitors. It suits RC timing, AC circuit and filter practicals in Class 12 physics, B.Sc. electronics and diploma labs. Production of the box takes place at the Science Lab Supplies factory, Plot 448, HSIIDC Industrial Area, Saha, Ambala, India, which sends quotations to schools, colleges, tender contractors and distributors.
Specifications
Values, ratings, switch, sockets and case of the capacitor box each take a row below. In short, a robust 75 x 100 x 40 mm ABS case carries a high-quality rotary selector switch and two 4 mm safety sockets, and every capacitor from 100 pF to 1 µF carries a 5% accuracy and a 63 V rating.
| Specification | Value |
|---|---|
| SKU | LSK-PL-10334 |
| Range | 100 pF to 1 µF, preferred values |
| Individual values | 100 pF, 220 pF, 470 pF, 2.2 nF, 4.7 nF, 10 nF, 22 nF, 47 nF, 100 nF, 220 nF, 470 nF, 1 µF |
| Accuracy | 5% (all values) |
| Voltage rating | 63 V (all values) |
| Selection | High-quality rotary selector switch |
| Connections | Two 4 mm safety sockets |
| Case material | Robust ABS |
| Case size | 75 x 100 x 40 mm |
| Manufacturer | Science Lab Supplies, Saha, Ambala, Haryana |
| Country of origin | India |
Applications and Experiments for the Capacitance Substitution Box
Because each value is one switch position away, the box makes it quick to repeat a measurement with different capacitances and see how the result changes. It suits any practical where a capacitor must be varied in steps, from charging curves to frequency-dependent circuits.
- Class 12 physics: studying capacitive reactance in AC circuits.
- B.Sc. practicals: RC time constant and charging and discharging, viewed on an Oscilloscope.
- Electronics labs: tuning RC filters and oscillators by substituting capacitor values.
- Diploma courses: finding a suitable capacitor value before soldering a permanent part.
Keep applied voltages below the 63 V rating of the capacitors.
Standard Scope of Supply
The Capacitance Substitution Box is supplied as a single unit, with all the capacitor values above built into the ABS case; any optional accessories are named on the quotation. Connecting Leads with 4 mm Safety Plugs can be quoted with it.
Packing, MOQ and Lead Time
A quotation may be requested for one box or a full batch for an electronics lab, and it lists the packing, delivery time and price for exactly that quantity. The matching resistance substitution box can go on the same physics lab equipment in India quotation.
As a registered exporter with an Importer-Exporter Code, Science Lab Supplies can ship to buyers in Sri Lanka, Vietnam, Malaysia, Peru, Egypt and Iraq. Electronics benches needing capacitor and resistor boxes can be priced through the contact page or the enquiry cart, and institutional bids go through the lab tender page.
Frequently Asked Questions
What capacitance values does the box offer?
Preferred values from 100 pF to 1 µF: 100, 220 and 470 pF; 2.2, 4.7, 10, 22, 47, 100, 220 and 470 nF; and 1 µF, selected with a rotary switch.
What are the accuracy and voltage rating?
All values have 5% accuracy and a 63 V rating, so keep the applied voltage below 63 V and allow for the 5% spread when calculating time constants.
Is Science Lab Supplies the manufacturer or a trader?
Switched capacitor boxes of this design are made by Science Lab Supplies in its Saha, Ambala facility in India, so the manufacturer itself quotes you and arranges dispatch.
How is the box connected into a circuit?
Through two 4 mm safety sockets on the case, which accept standard 4 mm plug leads, so the box drops into an RC circuit in place of a loose capacitor.
Related Substitution Boxes, Capacitors and Signal Sources
These seven items pair with a capacitance box in circuit practicals: two resistance substitution boxes and a decade box for RC work, loose and parallel-plate capacitors, a charging and discharging kit, and a signal generator for AC tests, all on one quotation.
- Resistance Substitution Box — 12 switched resistors in a compact box with 4 mm terminals.
- Resistance Substitution Box (24-step) — 10 Ω to 1 MΩ in 24 steps, 1/2 W resistors.
- Resistance Box — decade resistance box with 4 mm spin-free terminals.
- Capacitor Set — capacitors from 0.22 µF to 1000 µF, including electrolytic types.
- Parallel-Plate Capacitor — 20 cm plates whose spacing can be varied to study capacitance.
- Capacitor (Charging and Discharging) — power supply, multimeter, resistors and 1000 µF capacitor for charging studies.
- Bench Signal Generator — sine and square waves from 5 Hz to 50 kHz, up to 8 V peak to peak.
Browse the full Physics Lab range, the Electrical and Electronics range for decade boxes and trainers, or all physics lab equipment.
Last updated: 22 October 2026
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