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Find avalanche diodes in South Africa from Communica-comprehensive in-country inventory, expert selection support, and fast branch pickup for engineers & industry.
Choose from leading brands and voltage ratings ready for local dispatch.
Guidance on diode selection, ratings, and compatibility for South African applications.
Order online, collect in-branch, and receive VAT invoices across South Africa.
Avalanche diodes are specialised semiconductor components designed to safely handle reverse breakdown voltages, predominantly used for circuit protection, voltage regulation, and surge suppression. Sourcing avalanche diodes reliably within South Africa ensures manufacturers, engineers, and students have access to the parts required for sensitive and industrial-grade electronic designs-without the delays and administrative costs of international imports.
An avalanche diode is engineered to undergo an "avalanche breakdown" in reverse bias, conducting excess current safely rather than failing destructively. This controlled breakdown feature is ideal for:
While similar in behaviour to Zener diodes above ~5-6V, avalanche diodes are optimised for higher voltage tolerance and greater power dissipation. Their reliability under repeated surges makes them a popular choice for South African environments, where voltage transients and electrical storms can be common.
| Parameter | Typical Value Range | Notes for South Africa |
|---|---|---|
| Reverse Breakdown Voltage (VBR) | 12V - 400V+ | Match to circuit voltage and local mains surges |
| Peak Pulse Current (IPP) | 1A - 100A | Choose based on lightning/electrical fault exposure |
| Clamping Voltage | 16V - 470V | Ensure headroom for spike energy dissipation |
| Package/Footprint | DO-41, SMA, SMD | Check board compatibility and stocking at Communica |
When sourcing avalanche diodes in South Africa, lead times, local stock, and quick access for urgent repairs or ongoing production lines are crucial. Communica's multi-branch setup ensures you can check real-time stock or collect components at your nearest branch in Gauteng or the Western Cape.
To maximise protection and efficiency, match the avalanche diode's breakdown voltage to your circuit's normal maximum operating voltage, with appropriate margin for expected transients:
Example: If you need to protect a microcontroller input on a 5V system against 24V spikes, a 12-14V avalanche diode (such as 1.5KE14A) may clamp safely without impacting normal operation.
Power rating must exceed the expected energy delivered in a transient event. The typical calculation is:
P = VCLAMP x IPP x Pulse Width
Consult the datasheet's surge curves and specify a diode rated above your worst-case scenario. For high-frequency or repeated surges (as found in factory/industrial settings in South Africa), always build in derating margin.
Tip: Communica's Pretoria and Cape Town branches offer over-the-counter technical support and access to a wide component selection, letting you resolve urgent design or repair queries quickly. Account customers can also request VAT invoices and quotations for recurring procurement needs.
Free shipping for orders over ZAR 1,000.00.
Get a full refund if you had the product for less than 7 days.
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Very friendly and helpful; and a wide selection of items (at their location). You can also purchase via their WebSite; I have never been disappointed...
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...
Quick service from Layla and her team in providing technical assistance and getting my order together. This is the best service I have received in a l...
I love this place and have been purchasing my electronic parts over 25 years . Layla has been a super sales lady ..friendly and knows her products .
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Thy have a wide range of components. Thy do have a q to wait in but 1 come 1 serve. But while you wait thy have very cool stuff to look at you will al...
From warm welcome by the security check when you enter the store to sales man, then all the way to ladies behind the counter, one of them even organi...
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Visited a couple of times for supplies and specialised parts Staff is extremely friendly and always helpfull
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Awesome service from Sydney and Nicole...keep up the great job guys
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What an absolute gem Layla is! She went out of her way to source my requested items from another branch, without me asking, and done so with a great b...
I was assisted by Fatima. She was friendly, patient and professional. Thanks for the great service!
Verified customerGreat service. Cynthia has great knowledge of product and very friendly and helpful
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Verified customerI had a fantastic experience at Communica, thanks to the exceptional service provided by Rehaan in sales and Nicole at the cashier. Rehaan was incredi...
Got assisted by a very patient and diligent gentleman by the name Sydney. He was patient in getting me what I needed from the little information I gav...
The kind gentleman right behind the turnstiles at the entrance sales counter helped me immediately as I walked in, Sydney, I think. I needed 8 packs o...
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I had a fantastic experience with Communica. Whenever I need electronics on short notice, their sales and logistics team always goes the extra mile to...
Can i give Fatima her flowers.... 10 000 out of 100. Customer service-100% Patience-100% Product knowledge-100% Had the best shopping experience there...
Leila was very helpful and super nice!
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Puleng and Nicole gave me awesome and friendly service
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Fatima was very helpful and patient with my many queries. The shop itself has seen better days but the service was great.
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Great experience with every purchase thanks to Sydney and nicole
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Sydney was an awesome help, he approached as we walked in for assistance. Nicole was such a darling and very helpful as well. Awesome first time exper...
Ordered online, was just after 6am. Asked if I can pick items up as I wanted to install over the weekend and delivery stated 2-4 working days. Though...
Online support and communication is next level - great communication, fast response - very helpfull, recomended supplier - online payment was no hasse...
He's polite, good with people and made me feel free to talk.. all in all he's helpful
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Rehaan was the sales representative that helped us. He was friendly and helped us with in seconds. We where very pleased with the service and the expe...
I purchased the TP-LINK VIGI C340 4MM camera online... What an amazing camera. Easy to setup with long distance view, and superb quality. This was an ...
Best service received from Rocket! What a pleasure dealing with him. Thank you Rocket
Verified customerFast good price service. Thank you Sydney.
Verified customerThanks Fatima for an excellent service
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Excellent service so far
Verified customerSydney offered exceptional service. He took me step by step on what I needed to buy. Thank you Nicole for the service
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Excellent service by Sydney at the ino counter. So many awsome products! Perfect place to buy gifts for tech junky friends.
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Leburu and nicole were both very helpful my boss send me to get few items as I wasn't very familiar with the items Leburu and my boss spoke with each ...
Sydney and Nicole were amazing I came in and finished within no time thank you so much keep up the friendly service
Verified customerCustomer service is excellent. Thank you to Mpho for helping me get what I need from the store
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Sydney and Nicole were absolutely fantastic and helped me with my purchases. Thank you.
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Needed to buy a bluetooth GPS receiver. The staff was friendly, knowledgeable and assisted without any issues. This is a toys tore of note for peopl...
azul and Nicole were very helpful and very efficient
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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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Verified customerFatima is the best. She has great product knowledge.
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Verified customerAfter spending 2 days hunting for a component i found it here. Dealt with someone telefonically. Help was quick, answered all questions, and called me...
One of the cashier services rendered to me was here at communica by the lady named Nicole and her manager dolly they were both willing to go above and...
The service was excellent, Nicole and Rehaan were very helpful and professional in their work.
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Verified customerThe service was great and Nicole helped me alot. I will definitely come back
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Great service, Rehaan and Layla were spectacular with assistance. 10/10 Would definitely recommend.
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Mohamed Sharief is a great asset to Communica. He provides a 5 star service and good product knowledge. Keep up the good work.
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I received a great service from Rehaan, Windy and Nocole. Excellent customer service.
Verified customerVery good service. Always happy to help me. Thank you Nicole.
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Verified customerNicole serves with great enthusiasm and super friendliness. Great Customer Service.
Verified customerREHAAN and Nicole are extremely helpful and friendly people made my experience at communica a breeze to shop. Thank you again for the help.
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Quick quality customer service.
Verified customerGreat experiance and fast service. Nicole assited me in everything I required.
Verified customerCynthia was very very helpful.
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Good range of products. Excellent customer service from Nicole.
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I'm very impressed with Nicole the best service ever
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Very good service and a happy welcoming smile from the cashier Nicole
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Verified customerReceived good service Nicole and Cynhtia thanks you so much
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Anyone that seriously loves technology ought to spend time here. They definitely have what you want. Best tech store!
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Verified customerFatima & Nicole delivered an excellent customer service
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Verified customerExcellent customer service from Mpho and Cynthia.
Verified customerNicole was welcoming.. Good service.thanks
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Verified customerVery good service from Nicole
Verified customerPatient and kind
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Verified customerCHAT RESPONSE TIME DEFINITELY WAY ABOVE GENERAL AVERAGE, WELL DONE.
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Verified customerAlways very good service
Verified customerEXCELLENT SERVICE FRONT JACQUELINE AND Windie
Verified customerGreat service as always
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Verified customerMy electronics go to place
Verified customerGreat service
Verified customerSydney en Lacy was baie hulpvaardig. Goeie diens!
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
Verified customerGreat inventory. Very slow service, though the staff seem to do their best. Single till open mostly with overbearing security measures. Can do with so...
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.
Verified customerThe new ticketing system is great, but the queues are still exceedingly long, and there are hardly any staff on hand in the shop to assist with questi...
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
Verified customerExcellent range of items, with technical staff that know their stuff. Unfortunate location that makes it a bit difficult to get to, but worth the tre...
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...
Great place. Reasonable prices. Keeps component level items as well as security, surveillance and electrical items and tools
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Great pricing and a wide variety of products to choose from. A must visit if you've ever been to the Pretoria branch.
Verified customerNicole was very helpfull and friendly.
Verified customerGood job Nicole! Well done!
Verified customerSlowest service ever! Even worst cashiers. I shudder to go. Good products though.
Verified customerGood service, would recommend.
Verified customerWide range of electronics for the diy enthusiastic, ranging from solar systems to alarms and cctv.
Verified customerGreat for electronics but stock is a problem quite often so call before going through.
Verified customerService has improved but still a long way to go to actually sort it out.
Verified customerFriendly service and a vast range of electronic components, devices etc.
Verified customerThe is a computerised quing system and you can pick n pay....but the problem is the is no lift and the only way to get up is using steps
Verified customerFor Sonoff ewelink WiFi switch.
Verified customerThank you for your patience ma'am Mpho
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Verified customerSomethings are getting pricey, but still a good place to pick up components
Verified customerNicole and Sydney were very helpful
Verified customerElectronic store for DIY electronics and prototyping guys. Doesn't look all that great but should have what you're looking for.
Verified customerA good electrical/electronic sales store packed with almost every component you require
Verified customerIf you love engineering you'll love this shop apart from the terrible queues and long waiting times
Verified customerAlmost all electronic spares available at reasonable prices.
Verified customerVery fast and friendly service, avoid it in friday afternoon if possible.
Verified customerExcellent, ask for Sydney. Solved immediately
Verified customerThey have everything you would need. Service is good
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
Verified customerWide variety of electronic goods. Staff helpful with good advise.
Verified customerGood verity, lots of stock, mostly helpful staff
Verified customerVery helpfull. Thank you
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Verified customerExcellent service Nicole
Verified customerLarge selection, low on staff during lunch time when they are busy.
Verified customerGreat for your electronic needs - Prices are a bit expensive
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Verified customerDefinitely will have what you're looking for.
Verified customerCheap electronics and great educational goodies for the kids
Verified customergood selection of electronic supplies accessible
Verified customerGreat variety of stock on hand
Verified customerGood variety of electronic components available
Verified customerWide variety of electronic supplies available here
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Verified customerBig variety and good prices
Verified customerAll your electronics requirements under one roof, and more!
Verified customerThe place to go whatever your electrical and electronics needs.
Verified customerExcellent range of electronic products
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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
Verified customerGreat variety
Verified customerGood service
Verified customerElectronic components wholesaler
Verified customerloads of electronic components
Verified customerelectronics sales warehouse
Verified customerCool
Verified customerhuge selection
Verified customerCool electronics
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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