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Learn about 10k-ohm carbon film CFR25J resistors for electronic projects: key specs, usage tips, troubleshooting, and where to buy them in South Africa.
How 10kOhm CFR25J carbon film resistors work in circuits and common application examples.
Key specs, equivalents, and sourcing tips for building reliable South African projects.
Find trusted resistor manufacturers and models readily stocked at Communica branches.
Resistors are fundamental to all electronic circuits, with the 10kOhm (10,000-ohm) value being one of the most widely used for voltage dividers, pull-ups/pull-downs, sensor circuits, and analog-to-digital interfaces. The CFR25J series specifically refers to carbon film, 1/4 watt, 5% tolerance, axial resistors-a staple for breadboards, educational kits, and permanent builds.
In South Africa, the 10kOhm CFR25J resistor is ubiquitous across classrooms, university labs, prototyping benches, and small-batch industrial assemblies. Their affordability, easy coding (brown-black-orange-gold bands), and wide compatibility make them ideal for both beginners and experienced engineers.
| Parameter | CFR25J 10kOhm Value | Typical Notes |
|---|---|---|
| Resistance | 10kOhm (10,000 Ohm) | Standard coding: Brown-Black-Orange-Gold |
| Type | CFR (Carbon Film), Axial | Common for general-purpose uses |
| Power Rating | 0.25W (1/4 Watt) | For low-power signals/components |
| Tolerance | 5% | Sufficient for most analog/digital circuits |
| Max Working Voltage | 250 VDC | Do not exceed in standard prototyping setups |
Communica (Pty) Ltd stocks 10kOhm CFR25J resistors from leading global suppliers, both as individual components and in value-packs suitable for tertiary, school, or industry use. Stock levels are typically strong at Samrand, Pretoria, and Cape Town branches, and large quantities can be quoted on request.
Common applications for 10kOhm CFR25J resistors include:
Example: Limiting current for an LED with a 5V supply and a forward voltage drop of 2V (standard red LED).
| Type | Application | Pros | Cons |
|---|---|---|---|
| CFR25J Carbon Film | General prototyping, educational | Low cost, widely available, easy to handle | Not for critical precision or high power |
| Metal Film 1/4W | Test & measurement, higher accuracy | Tighter tolerance, lower noise | Slightly higher price |
| Thick Film SMD | Surface mount, compact builds | Space saving, automated | Needs reflow equipment, harder for students |
10kOhm CFR25J resistors are trusted workhorses for South African electronics. Communica's ready stock, branch collections, and mix-and-match packs suit everyone from one-off experimenters to teachers provisioning for a classroom. For hassle-free builds and reliable continuity, always consider circuit specs and power ratings. Browse the resistor category or shop by brand for easy selection.
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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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...
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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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Verified customerLarge number of electronic components
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