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Discover where to find CFR50J 10K resistors in stock for your electronics projects. See specs, application notes, and South Africa buying tips from Communica.
Learn the specs and uses for these essential carbon film resistors.
Get practical advice on local stock, equivalent types, and alternatives for your project.
See why these resistors suit labs, education kits, and prototyping in South Africa.
CFR50J 10K resistors are widely used carbon film resistors valued for general-purpose signal conditioning, voltage dividers, and pull-up/down applications in hobby, educational, and light industrial electronics. The "CFR" prefix denotes Carbon Film Resistor, "50" indicates a 0.5W (1/2 W) power rating, "J" is the tolerance code (5%), and "10K" specifies the resistance value-10 kilo-ohms (10,000 Ohm).
| Type | Value | Power | Tolerance | Max Voltage | Typical Use |
|---|---|---|---|---|---|
| CFR50J 10K | 10 kOhm | 0.5 W | 5% (J) | Up to 350 V | Pull-ups, signal, general |
| MFR50 10K (Metal Film) | 10 kOhm | 0.5 W | 1% (F) | Up to 350 V | Precision signal |
| CFR250J 10K | 10 kOhm | 0.25 W | 5% (J) | Up to 250 V | Low power/compact |
In university electrical engineering labs and high school robotics clubs, CFR50J 10K resistors are often the first choice due to their robust leads, easy-to-read color bands, and cost-effectiveness for assembling project kits in bulk. Local availability through distributors such as Communica ensures quick restock and VAT invoicing for education or institutional purchasing.
While the CFR50J 10K is a great default, consider the following when selecting resistors for your project:
Let's walk through two South Africa-relevant examples:
If connecting a digital input (e.g. Arduino or ESP32 GPIO in a STEM project), a 10 kOhm resistor connects from the input pin to 3.3V (or 5V):
3.3V ---/\/\/\/---> GPIO (with 10kOhm, ~0.33 mA max current draw)
Power dissipated is minimal: P = V2 / R = (3.3)2 / 10,000 = 0.0011W, easily within the 0.5W rating.
For a 5V circuit, using a red LED (forward voltage 2V, target current 3mA):
Communica keeps CFR50J 10K resistors in bulk packs, strip-cut quantities, and as part of assorted value kits. For procurement teams, VAT-compliant invoicing is available, and popular brands stocked locally include ROYAL OHM and UniOhm. Lead times are typically 1-3 working days for collection at Samrand or Cape Town, with courier options for remote areas across South Africa.
If you need to check branch stock before traveling, use branch info to confirm availability and collection times.
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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