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Explore the differences between the CFR100J-220R carbon film resistor and other resistor types. Learn about performance, specs, applications, and local South African sourcing with Communica.
Value, tolerance, and use cases for this carbon film resistor.
Performance differences between carbon film, metal film, and wirewound options.
Where to get resistors in South Africa and what to check before buying.
The CFR100J-220R is a widely used carbon film resistor featuring a 220 Ohm (ohm) resistance value, rated at 1 watt power dissipation, and a tolerable voltage up to the specifications set by the manufacturer. The 'J' suffix denotes a tolerance of 5%. This device is popular in South African hobbyist projects, education kits, and general industrial repairs due to its balance of cost, availability, and electrical performance. Specifications and typical applications can guide you to optimal use.
| Parameter | CFR100J-220R | Common Alternatives |
|---|---|---|
| Technology | Carbon Film | Metal Film, Wirewound |
| Resistance | 220 Ohm (ohm) | 220 Ohm (typ.) |
| Power Rating | 1W | 0.25W, 0.5W, 1W, 2W+ |
| Tolerance | 5% (J) | 1%, 2%, 5%, 10% |
| Typical Use | General purpose, education, hobby | Precision (metal film), high power (wirewound) |
| Noise | Moderate | Low (metal film), higher (wirewound at HF) |
To decide whether to use a CFR100J-220R or another resistor, it's most useful to understand how it differs from metal film, wirewound, and carbon composition resistors: How to choose the right resistor for your project depends on these distinctions.
South African makers and engineers often select carbon film for LED limiters, biasing, and general circuit use, while metal film is favoured where precision is essential, such as sensor interfacing and oscillators. Learn more about applications of CFR100J-220R resistors in electronics.
Suppose you need to limit current to an LED from a 5V microcontroller output. You calculate the value using Ohm's law:
Calculation:
R = (V - VF) / I = (5.0V - 2.0V) / 0.01A = 300Ohm
A 220Ohm resistor would give:
I = (5.0V - 2.0V) / 220Ohm ~ 13.6mA
So, the CFR100J-220R would provide slightly more current but is within range for typical red LEDs. For tighter accuracy, a 1% metal film resistor may be preferable.
Communica stocks extensive ranges of carbon film, metal film, and wirewound resistors from leading brands such as Royal Ohm, Yageo, and other global manufacturers. You can also find resistor kits for prototyping or bulk procurement to support student labs and production lines.
| Type | Best For | Typical Tolerance | Example |
|---|---|---|---|
| Carbon Film | Hobby, general, education | 5% | CFR100J-220R |
| Metal Film | Precision, low noise, measurement | 1% | MF1/4W-220R |
| Wirewound | High power, motor drives | 5% or 10% | WW2W-220R |
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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