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Detailed review of the MFR25F-2R7 2.7Ohm 1/4W metal film resistor: reliability, typical use cases, test results, and SA sourcing tips. Trusted by engineers and students.
MFR25F-2R7 proven through lab and field use in SA environments.
Low tolerance, thermal stability, and minimal drift verified in common circuits.
Available for collection or volume orders via Communica branches.
The MFR25F-2R7 is a metal film resistor with a resistance value of 2.7 Ohm, rated for 0.25W (1/4 watt). Metal film resistors are widely used in hobby, educational, and industrial electronics due to tight tolerance, low noise, and long-term reliability. The MFR25F series, including the 2R7 value, is popular with South African technicians and students for breadboarding, PCBs, and repair.
Common use cases include current sensing, low-value pull-down circuits, LED and relay current limiting, and as feedback components in analog and digital designs.
| Property | Typical Spec (MFR25F-2R7) |
|---|---|
| Resistance | 2.7 Ohm 1% |
| Power Rating | 0.25 W (at 70 degreesC) |
| Temperature Coefficient | 100 ppm/ degreesC |
| Maximum Working Voltage | 250 V |
| Construction | Axial, metal film |
| Common Brands at Communica | Royal Ohm, Yageo, Amphenol |
Metal film resistors are increasingly chosen over carbon film for their tighter tolerance and improved thermal noise characteristics, critical for analog signal and instrumentation designs.
South African note: Local engineering teams prefer metal film types for their long service life in high-humidity or fluctuating temperature environments, typical of local industrial workshops and student labs.
Recent reviews from electronics labs, prototyping houses, and tertiary institutions in South Africa highlight key reliability findings:
When specifying the MFR25F-2R7 for your application, confirm your circuit's power dissipation and ambient temperature. Use Ohm's Law for current and power calculations:
| Formula | Example (5V across resistor) |
|---|---|
| I = V / R | 5V / 2.7Ohm = 1.85A |
| P = V x I | 5V x 1.85A = 9.25W (exceeds 0.25W rating) |
In practice, this resistor is best suited to low current paths (under 0.3A) and signal conditioning.
Always check datasheets for exact power rating and derate by 50% for ambient temperatures above 70 degreesC or for continuous operation in enclosed prototypes.
The MFR25F-2R7 is stocked by Communica in bulk and strip form, with same-day availability from the Samrand, Pretoria, and Cape Town branches (stock-dependent). VAT invoices, education quotes, and fast branch transfers are available. Royal Ohm, Yageo, and Amphenol are commonly supplied, supporting SA curriculum projects and industrial maintenance needs.
Find the MFR25F-2R7 under the Resistors category, or explore by brand for specific sourcing needs.
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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Verified customerNicolene
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