Find the right capacitor for your project - in stock locally
When a timing circuit, power supply filter or motor-run capacitor is holding up your build, waiting on overseas shipping is costly. Communica keeps a broad, locally stocked selection of electrolytic, ceramic (MLCC), film and tantalum capacitors in stock so South African makers, students and procurement teams can finish projects on time. Benefit from branch collection in Samrand, Pretoria CBD or Cape Town, VAT invoices for procurement, and help picking the right spec for your application.
Why local stock matters
Availability reduces project risk: faster turnaround for classroom labs, prototype iterations and production runs. Communica's inventory focuses on common values and sizes used in hobbyist and industrial work - 0.1uF to 100uF MLCCs, 1uF-4700uF electrolytics, and polypropylene film values for timing and filtering. Check live availability or branch hours to plan collection: Branches & Trading Hours.
Quick spec callouts
Match capacitor type to the job: MLCCs for decoupling and high-frequency work, electrolytics for bulk smoothing, film for precision timing and low loss. Pay attention to voltage rating, temperature range and ESR (equivalent series resistance) for power electronics. Below is a compact spec comparison to guide choices.
| Type | Typical Uses | Strengths | Watch For |
|---|---|---|---|
| Ceramic (MLCC) | Decoupling, RF | Low ESL, small | Capacitance drops with bias/temperature |
| Aluminium Electrolytic | Power smoothing | High capacitance per volume | Polarised, limited lifetime at high temp |
| Film (Polypropylene) | Timing, audio, RFI | Stable, low loss | Larger size, higher cost |
Specification guidance and compatibility
Basic rules: choose a voltage rating at least 1.5x the circuit operating voltage for electrolytics; for MLCCs check DC bias characteristics if using at higher voltages; for timing circuits prefer film capacitors for stable tolerance. When replacing a capacitor, match capacitance and voltage, and select equal or better temperature and ripple current ratings.
Looking for components by brand or to compare datasheets? Browse brands and part families at our shop-by-brand page for compatibility notes: Shop by Brand. For category browsing and quick filtering, use our collections page: Collections.
Practical example: smoothing a 12 V buck converter
If a buck converter specifies 470uF, 25 V low-ESR output cap, choose an electrolytic or solid-polymer with ripple current rating above the converter's output ripple. Combine a 10uF MLCC across the output for high-frequency decoupling. If space is constrained, parallel multiple MLCCs (smaller values) rather than relying on one large part.
Need test equipment to validate your selection? See our test & measurement range in the all-products index: All Products.
