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Discover practical alternatives to the MFR25F 180K resistor. Compare specs, learn selection criteria, and source reliable substitutes in South Africa with Communica.
Identify key electrical specs and tolerances when substituting resistors.
Tips for finding alternative resistor types and brands at Communica branches.
How to prevent mismatches that impact circuit performance and reliability.
The MFR25F-180K resistor is a widely used 180 kOhm 1% tolerance, 0.25W (1/4W) metal film resistor suitable for signal filtering, voltage dividers, and control circuits across hobbyist, educational, and industrial settings. When this exact part is out of stock or discontinued, selecting a reliable substitute ensures your design continues to perform within specification.
Before selecting a substitute, check these critical parameters on your datasheet and in your application:
| Spec | MFR25F-180K | Typical Substitute |
|---|---|---|
| Resistance | 180Ohmk (1%) | 180kOhm (1% or 5%) |
| Power Rating | 0.25W | 0.25W or higher |
| Type | Metal Film | Metal or Carbon Film |
| Size | Axial, 6.3mm body | Similar axial footprint |
When the exact Yageo MFR25F-180K is unavailable, consider substitutes such as: electronics projects
In most audio, sensor signal processing, or university lab environments, matching the resistance and staying at or above the original power rating is essential. For low-frequency analog circuits, metal film types are preferred for better noise performance and stability. If the power demand is minimal, a 1% carbon film type may also suffice in prototypes.
If an exact 180kOhm is unavailable, how close can you go? For a divider or bias circuit, staying within the original tolerance (1%) is preferable. In less critical roles, 5% may work. For Ohm's Law calculations:
V = I x R
For 5V across 180kOhm:
• I = 5V / 180,000Ohm = 27.7uA
If you used a 180kOhm substitute with a power rating of 0.25W or more, the current and voltage drops remain effectively unchanged.
| Brand | Part Code | Type | Stock Status* |
|---|---|---|---|
| UniOhm | UF25-180K | Metal Film 1/4W | Check current stock |
| KOA | MF1/4W-180K | Metal Film 1/4W | Usually available |
| Vishay/Dale | CMF55-180K | Metal Film 1/4W | Lead time may apply |
| Multicomp | MCRE000188 | Carbon Film 0.25W | Check stock |
*Stock and availability may vary seasonally-always verify live on the Communica website.
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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