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Explore CFR25J-240R resistors for your electronics projects. Learn about specifications, South African availability, and practical design tips from Communica.
Key specs: 240Ohm value, 0.25W rating, 5% tolerance carbon film type.
How to choose, calculate, and troubleshoot resistor use in circuits.
Find local stock, popular brands and collection options at Communica.
Resistors are essential in controlling current, setting voltage levels, and protecting sensitive components in electronic designs. The CFR25J-240R is part of the CFR25 series-carbon film resistors rated at 240Ω resistance, 0.25W (1/4 watt) power dissipation, and 5% tolerance. These standard, through-hole resistors are locally available and widely used in education, prototyping, repairs, and low-power applications throughout South Africa.
| Parameter | Value | Notes |
|---|---|---|
| Resistance | 240Ohm (ohms) | Marked 240R on body |
| Series | CFR25 | Carbon Film type |
| Power Rating | 0.25W (1/4 Watt) | At 70°C ambient |
| Tolerance | 5% | Gold band, typical for general purpose |
| Body Size | ~6.5mm x 2.3mm | Standard for 1/4W |
| Temperature Range | -55°C to +155°C | For most project uses |
In South Africa, the CFR25J-240R and similar resistors are easily sourced as loose components or in multipacks for projects, repairs and educational kits. Their robust construction and affordable price make them suitable for breadboards, PCB assembly, and final builds.
Consider the following factors when specifying a 240Ω carbon film resistor for your circuit:
Always check the resistor's power rating to prevent overheating. Use Ohm's Law and the power formula:
Example: If using the CFR25J-240R with a 5V supply in series with an LED (forward voltage 2V, desired current 12.5mA):
This is well below the 0.25W maximum-safe for this application. Allow margin for higher supply voltages or continuous operation.
Communica stocks CFR25J-240R resistors from major component brands, with both in-store and online options. Typical lead times for ex-stock are 1-3 days across Gauteng and the Western Cape. VAT invoices and educational account support are available. Check the All Products section or your nearest branch for current inventory.
| Spec | CFR25J-240R | Metal Film (MF25-240R) |
|---|---|---|
| Tolerance | 5% | 1% or 2% |
| Noise | Standard | Lower |
| Price (ZAR, estimate) | ~R0.40/unit (multipack) | ~R0.55+/unit |
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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