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Learn how to diagnose and fix failures with CFR200J 1K2 resistors. Detailed troubleshooting, test methods, and practical SA context from Communica's components experts.
Learn to spot overload, overheating, and installation issues with CFR200J 1K2 resistors.
Ensure you verify resistance using correct meter techniques and circuit isolation.
Get tips on finding matching resistors at Communica branches or online.
CFR200J 1K2 resistors are widely used in electronics projects, industrial equipment, and education labs across South Africa. The "CFR" stands for Carbon Film Resistor, "200" refers to a 2-watt power rating, "J" designates a 5% tolerance, and "1K2" indicates a 1.2 kOhm resistance value. These resistors are valued for their affordability, stability, and availability from brands featured by Communica, such as UniOhm, KOA Speer, and Royal Ohm. While reliable in most circuits, issues may still arise due to application stresses or handling.
| Parameter | Value (Typical) | Notes |
|---|---|---|
| Resistance | 1.2 kOhm (1K2) 5% | "J" = 5% tolerance |
| Power Rating | 2 W | Derate above 70 degreesC ambient |
| Maximum Working Voltage | 350 V | Check datasheet for brand specifics |
You'll commonly find CFR200J 1K2 resistors in power supplies, analog signal circuits, and prototyping breadboards where reliable 2-watt dissipation is required.
Sourcing the right replacement is critical to restoring circuit function. Always confirm:
South African hobbyists, repairers, and procurement teams can check Communica's online catalogue for immediate local stock or confirm lead times for bulk orders. Popular stocked brands (UniOhm, KOA Speer, Royal Ohm) offer good electrical equivalence, but always check the datasheet for subtle size or voltage differences.
For best results, desolder at least one resistor leg to measure accurately. Other parallel circuit elements may affect in-circuit readings, leading to incorrect troubleshooting.
| Test Condition | Expected Result |
|---|---|
| Good resistor, isolated | 1,140 Ohm - 1,260 Ohm (within 5%) |
| Open/faulty | Very high or Ohm |
| Drifted or stressed | >5% deviation from 1.2 kOhm |
Suppose your circuit puts 20 V across the CFR200J 1K2 resistor. Calculate actual power dissipation:
This is well below the 2 W rating. Continuous operation at or above the rating (2 W) could cause the issues described earlier.
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.
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