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Explore the top uses for CFR50J 1M0 resistors in SA electronics: biasing, filtering, voltage dividers and more. Advice for students, makers, and industry professionals.
Biasing, input protection, RC timing, and voltage dividers with CFR50J 1M0 resistors.
Consider tolerance, wattage, and sourcing from trusted brands stocked locally.
Stock availability, branch collection, and education-ready packs at Communica.
CFR50J 1M0 resistors are a popular choice for both hobbyists and professional designers in South Africa, thanks to their balance of performance and affordability. The "CFR" stands for Carbon Film Resistor, with "50" representing a 0.5W power rating, "J" indicating a 5% tolerance, and "1M0" denoting a 1 megaohm (1,000,000Ohm) resistance value. Their widespread availability-especially at local Communica branches-makes them a reliable building block for a variety of electronic circuits.
| Parameter | Value | Notes |
|---|---|---|
| Resistance | 1 MOhm (1,000,000Ohm) | High value, suited for biasing & leakage paths |
| Tolerance | 5% (J) | General-purpose applications |
| Power Rating | 0.5 W (1/2 watt) | Suitable for most signal-level circuits |
| Body Type | Through-hole | Fits breadboards, stripboards, PCBs |
| Temp. Coefficient | Typically 250ppm/ degreesC | Adequate for non-precision roles |
Popular brands such as UniOhm, Royal OHM, and KOA Speer are commonly stocked at Communica, and bulk packs are available for educational labs or repair kits. Always check local stock availability and branch collection hours if you need to fulfil urgent builds or classroom needs.
For most applications, a CFR50J 1M0 resistor will suffice. Consider upgrading to metal film resistors if superior noise performance or lower temperature coefficient is required. Always verify power dissipation and maximum working voltage-refer to datasheets or manufacturer guidance, especially when dealing with voltages over 200VDC.
| Application | Circuit Detail | Why 1MOhm? |
|---|---|---|
| Non-Inverting Op-Amp | Biases input to ground to eliminate offset drift | High value prevents signal loading |
Input —1MOhm—— Op-Amp +
GND
The time constant (tau) of an RC circuit is = R x C. With R = 1,000,000Ohm and C = 1F:
= 1MOhm x 1F = 1 second.
Useful for LED flashers, monostable delays, or other timing functions requiring long intervals without large capacitor values.
For sampling high voltages while keeping circuit current low. Example: Two 1MOhm resistors to halve a DC voltage:
+Vdc —1MOhm——1MOhm— GND
Output (1/2 Vdc)
CFR50J 1M0 resistors are widely available at Communica in bulk and singles. Education packs suit universities and FET colleges, and VAT invoicing streamlines purchasing for procurement teams. Popular carbon film brands stocked include UniOhm, Royal OHM, and KOA Speer. Always check resistor stock availability online or confirm with your local branch for fastest order turnaround.
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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