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Master selection of CFR50J 1K8 resistors: datasheet specs, tolerance, power rating, application advice, and stock tips for South Africa (Communica).
Check resistance, tolerance, and power rating to match your circuit's needs.
See how CFR50J 1K8 fits common projects in SA classrooms or workshops.
Learn where and how to find genuine resistor stock quickly at Communica branches.
A CFR50J 1K8 resistor is a carbon film type with a resistance of 1.8 kOhm (kilo-ohms), a typical power rating of 0.5W (1/2 watt), and a tolerance of 5%. These resistors are widely used in analog and digital electronics across South Africa's student labs, makerspaces, and industrial environments for current limiting, pull-up/pull-down, and signal conditioning tasks.
| Parameter | Typical Value (CFR50J 1K8) | Notes |
|---|---|---|
| Resistance | 1.8 kOhm | E24 series, color code: brown-grey-red-gold |
| Tolerance | 5% (J) | Actual value ranges from 1.71 kOhm to 1.89 kOhm |
| Power Rating | 0.5W (1/2 watt) | Do not exceed this for steady-state dissipation |
| Body Style | Axial, 1/2W size | Lead spacing fits standard breadboards, PCBs |
| Temp Coefficient | 350ppm/ degreesC (typical) | Minor drift in most indoor settings |
This yields 18 x 100 = 1,800 ohms. Be sure to check the color bands before soldering, as mixups (e.g., 1.8 kOhm vs. 18 kOhm) are a frequent source of circuit faults among SA students and hobbyists.
Use Ohm's law (V = IR) to determine appropriate resistance. For instance, to limit current through a 5V circuit:
Formula: Power (P) = V2 / R or P = I2 x R.
Communica typically stocks CFR50J and similar series from major brands (e.g., Royal Ohm, KOA, Yageo), with fast collection at Samrand HQ or regional branches. Orders for education or procurement can be issued with VAT invoices, and bulk packs are often available for classrooms or industry restocks.
| Type | Resistance | Power Rating | Tolerance | Application |
|---|---|---|---|---|
| CFR50J 1K8 | 1.8 kOhm | 1/2 W | 5% | General, education, pull-up/down |
| MFR25 1K8 | 1.8 kOhm | 1/4 W | 1% | Precision, signal paths |
| CFR100J 1K8 | 1.8 kOhm | 1 W | 5% | Power/drive stages |
Free shipping for orders over ZAR 1,000.00.
Get a full refund if you had the product for less than 7 days.
Nationwide delivery within 2 - 4 working days.
Communica supplies semiconductors and electronic components to industries such as automotive, electrical, automation, mining, and education.
Disclaimer: This content is for educational purposes only. Product availability, pricing, and specifications are subject to change. Always verify current details on the retailer's website before making a purchase. We may earn affiliate commissions from qualifying purchases.
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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!
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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...
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Amazing services Rehaan is the best, just ask for him. Just excellent service. You may end up buying more things than you had planned though. But it ...
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!
Verified customerThanks for you friendly and good service...
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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
Verified customerAt the till we met Nicole, First of her name! The rightful heir to the iron throne! the Unburnt, Breaker of Chains and pillar of strength at Communic...
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.
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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
Verified customerLovely lady serving me named Nicole and I got very good assistance from Leburu on th floor whom directed me toward the correct goods. Will visit again...
Excellent service by Sydney at the ino counter. So many awsome products! Perfect place to buy gifts for tech junky friends.
Verified customerGreat customer care, with Nicole in the front Desk, the team is fully on the customer support gear, really appreciate your smile Team, Ola.
Verified customerI met Leburu and Nicole at the shop, Leburu took me to the right place with a great smile, then took me with my stuff to cashier Nicole where I paid a...
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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Verified customerThe service I always get from Sydney And Lacy the Cashier is amazing. Those are my guys...keep up the good works gentlemen.
Verified customerOrdered online. Got my order in less than 24 hrs. I was updated all the time on the progress. I have never seen service like this. Thanks and well don...
Sydney and Nicole were absolutely fantastic and helped me with my purchases. Thank you.
Verified customerLovely service received from nicole at the cashier point....it was my first time here and i will be back for certain
Verified customerAwesome service, very friendly and helpful people. Best help and assistance from Avi, and such lovely chats with Nicole.
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Verified customerUnbelievable!! It is now Saturday evening 23 December - 21:15 - and just finished online assistance from Communica - this is service I am not used to ...
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
Verified customerCynthia at the counter is always very helpful, in fact, all the counter sales ladies are very helpful. Can't say the same for the staff when calling ...
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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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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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.
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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.
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Very good service and a happy welcoming smile from the cashier Nicole
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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 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!
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Verified customerFor Sonoff ewelink WiFi switch.
Verified customerThank you for your patience ma'am Mpho
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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
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Verified customergood selection of electronic supplies accessible
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Verified customerGet answers to common questions about Circuit Protection And Passive Components
