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Learn how to diagnose faulty 100uF capacitors: common symptoms, test methods, part selection, and practical South African repair scenarios. Explore tools and replacement options locally.
Spot ESR increase, leaks, bulges, or intermittent failure symptoms in your circuit.
Simple DMM, ESR meter, and in-circuit approaches to verify 100uF capacitor health.
Find correct types, voltage ratings, and trusted brands stocked at Communica branches.
100 microfarad (100uF) capacitors are widely used for smoothing, filtering, timing, and decoupling in power rails and audio circuits. They're common in both hobbyist kits and professional SA industry builds, found across power supplies, Arduino shields, and PLC projects. Issues with these capacitors can cause ripple, hum, lost data, or outright circuit failure.
| Type | Polarity | Mounting | Usual Voltage Rating (V) | Main Application |
|---|---|---|---|---|
| Electrolytic (Radial) | Yes | Through-hole | 6.3-50 | Power smoothing |
| Electrolytic (SMD) | Yes | Surface-mount | 6.3-25 | Decoupling, compact builds |
| Tantalum | Yes | Through-hole/SMD | 10-35 | Timing, precision |
Most 100uF capacitors in South African labs are aluminum electrolytics, installed with correct polarity (long lead = positive) and a voltage margin >= 30% above supply rail. Trustworthy brands like Panasonic, Nichicon, Rubycon, Wurth Elektronik, and Samwha are available from Communica.
Communica stocks thousands of 100uF capacitors in-store and online from brands such as Panasonic, Nichicon, Rubycon, Wurth Elektronik, and Epcos. Check the Capacitors category and filter by voltage, ESR, and mounting style. Always confirm branch stock and VAT invoice requirements for tertiary projects or procurement.
| Symptom | Possible Cause | Action |
|---|---|---|
| No power/boot | Shorted or open capacitor | Replace with voltage-matched part |
| Audible hum | High ESR/faulty 100uF cap | Test ESR, swap if faulty |
| Leaking/bulging | Electrolyte breakdown | Immediate replacement required |
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Review for Communica Samrand Security Wanted to share a heartfelt thank you to the security team at Communica Samrand! Yesterday, I had a personal ex...
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He's polite, good with people and made me feel free to talk.. all in all he's helpful
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Sydney and Nicole were absolutely fantastic and helped me with my purchases. Thank you.
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They have mostly any electronic tool and components that you may require - Thanks to Nicole for helping me.
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The service was excellent, Nicole and Rehaan were very helpful and professional in their work.
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Verified customerNicolene
Verified customerGreat place to purchase electronic components at a fair price. They have a wide range of products and a well functioning ticketing system that ensures...
After being supplied the incorrect track for my garage motor, despite me asking twice if it was the correct track, I had to return to the store to exc...
They have most every electronics component you might need. Staff are knowledgeable and friendly. I was looking for a bespoke miniature item for a lapt...
Great service as always from Nicole and Sydney especially Mpho at the sales desk
Verified customerGood Array of products and sound advice
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I visit Communica once in a blue moon. Always wish i have more time to look at everything. Good & friendly service. Nothing wrong with a queuing syste...
Currently have only purchased items from their on-line store. Received what I ordered plus quick delivery. No complaints to date.
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I needed a heat-sensitive diode as one of my Philips appliances had had a failure. Philips wants you to throw the entire thing away, but I tried look...
I got the most pleasant service from Sydney and Windie
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Wide range of electronic components. Very likely to find what you are looking for. Arthur was very helpful. Don't bother trying to call for informatio...
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Verified customerNicole was very helpfull and friendly.
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Verified customerFriendly service and a vast range of electronic components, devices etc.
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Verified customerFor Sonoff ewelink WiFi switch.
Verified customerThank you for your patience ma'am Mpho
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Verified customerNicole and Sydney were very helpful
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Verified customerExcellent, ask for Sydney. Solved immediately
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Verified customerBig electronic component shop. Counter can be very busy. Lots of parking.
Verified customerClose to closing time so i was in and out quickly
Verified customerAll the goodies in one place and Mohamed is always willing to help
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Verified customerExcellent service Nicole
Verified customerLarge selection, low on staff during lunch time when they are busy.
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Verified customerDefinitely will have what you're looking for.
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Verified customergood selection of electronic supplies accessible
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Verified customerLove everything here...
Verified customerGood range of products
Verified customerWhatever you need they have
Verified customerLarge number of electronic components
Verified customerCan spend hours in there
Verified customerRather a slow process
Verified customerExcellent merchandising
Verified customerGood products
Verified customerHelpful and efficient
Verified customerPlace if definite interest
Verified customerGet electronic kits
Verified customerWide range of components
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Verified customerFascinating
Verified customerWaiting time can be annoing.
Verified customerCommunica supplies semiconductors and electronic components to industries such as automotive, electrical, automation, mining, and education.
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