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Read real-world reviews and technical ratings on the CFR25J-1M0 1MOhm carbon film resistor. Learn how it performs in South African labs, classrooms, and industry.
CFR25J-1M0 is popular for education, prototyping, and general purpose circuits.
Analysis of user reviews, technical specs, and reliability in practical South African scenarios.
Learn about availability, lead times, and trusted brands at Communica branches.
The CFR25J-1M0 is a widely adopted carbon film resistor, valued for its 1 megaohm (1MOhm) resistance, 0.25W (1/4 watt) power rating, and general-purpose characteristics. Popular across South African universities, schools, workshops, and industry, this resistor is a staple for both educational kits and professional-grade circuit prototypes. At Communica, makers and engineers can source CFR25J-1M0 resistors for breadboard development, analog filtering, biasing, and signal conditioning tasks.
| Parameter | Value |
|---|---|
| Resistance | 1MOhm (1,000,000Ohm) |
| Tolerance | 5% (J-grade) |
| Power Rating | 0.25W (1/4 watt) at 70 degreesC |
| Body Type | Axial, carbon film |
| Max Working Voltage | <=250V typical (check datasheet) |
| Temperature Coefficient | 350ppm/ degreesC typical |
The CFR25J-1M0 fits standard breadboard layouts and component lead spacing. Its color code is brown-black-green-gold.
Industry reviews consistently give 4-5 star ratings for reliability within the stated tolerance and power usage, though some recommend metal film types for critical low-noise designs.
While suitable for a broad range of electronics projects, the CFR25J-1M0 is not rated for precise reference or high-current use. For specialist designs, consider metal or wirewound resistors for tighter tolerance or higher power ratings.
Suppose you need a pull-down resistor for a MOSFET gate in a mains-sensing circuit. With a 230V AC signal rectified down and clamped to logic level (max 5V), a 1MOhm pull-down ensures minimal current draw.
| Parameter | Formula | Calculation |
|---|---|---|
| Current through 1MOhm at 5V | I = V / R | I = 5V / 1,000,000Ohm = 5uA |
| Power dissipated | P = V2 / R | P = 25 / 1,000,000 = 0.025mW |
This is well within the CFR25J-1M0's 0.25W rating and demonstrates why the part is often used for high-value, low-current roles in microcontroller circuits or filtering paths.
Communica sources carbon film resistors from trusted global manufacturers such as YAGEO, Uniohm, and Royal Ohm. Buyers can filter for CFR25J equivalents or browse by resistance value and tolerance. Lead times are usually short (1-3 business days for main branches), with bulk discounts available for education and institution purchasing.
Students, technicians, and engineers also benefit from easy branch collection and the option for VAT-compliant invoicing. Pair your resistor order with other passives-capacitors, potentiometers, terminal blocks, and breadboards-using Communica's curated Circuit Protection & Passive Components category and the Shop by Brand directory.
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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