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. Science Lab Supplies assembles the box in its factory at Plot 448, HSIIDC Industrial Area, Saha, Ambala, India, and supplies schools, colleges, tender contractors and distributors directly.
Specifications
The unit is housed in a robust ABS case measuring 75 x 100 x 40 mm, with a rotary selector switch and two 4 mm safety sockets. All capacitor values carry a 5% accuracy and a 63 V rating, covering the range from 100 pF up to 1 µF.
| Parameter | Value |
|---|---|
| SKU | LSK-PL-10334 |
| Range | 100 pF to 1 µF, preferred values |
| Values listed | 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 | Rotary selector switch |
| Connections | Two 4 mm safety sockets |
| Case | ABS, 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 is used wherever 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 with 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 as described above, with all listed capacitor values built into the ABS case; any optional accessories are listed on the quotation. Connecting leads with 4 mm plugs are not part of the unit and can be quoted separately.
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. Write to the team via the contact page, place items in the enquiry cart, or follow the lab tender page for tender enquiries.
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 are specified at 5% accuracy with a 63 V rating.
Is Science Lab Supplies the manufacturer or a trader?
Manufacturer. The substitution box is put together in the company's own Saha, Ambala facility in India, which quotes buyers directly.
How is the box connected into a circuit?
Through two 4 mm safety sockets on the case, which accept standard 4 mm plug leads.
Related Substitution Boxes and Capacitors
These four items pair with a capacitance box in circuit practicals: a resistance substitution box for RC work, a decade resistance box for finer resistance steps, a set of loose capacitors including electrolytics, and a complete charging and discharging kit, all on one quotation.
- Resistance Substitution Box — 12 switched resistors in a compact box with 4 mm terminals.
- Resistance Box — decade resistance box with 4 mm spin-free terminals.
- Capacitor Set — capacitors from 0.22 µF to 1000 µF, including electrolytic types.
- Capacitor (Charging and Discharging) — power supply, multimeter, resistors and 1000 µF capacitor for charging studies.
Browse the full Physics Lab range or all physics lab equipment.
Last updated: 25 September 2026
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