
Yageo
Strongest alternative with matched precision specs but slightly lower resistance.
Finding a substitute for the ARG02BTC2493, a 249kΩ 0.1% precision resistor, involves balancing resistance value with performance. While no exact match exists, several parametric alternatives are available that require careful review.
Resistance change requires validation. Downgrades to tolerance/TCR will reduce circuit precision.
All suggested alternatives share the same 0402 package, ensuring physical compatibility.
No exact drop-in replacement was found. The closest options are parametric alternatives that require engineering review of the resistance change.
Prioritize thin film 0402 resistors like the Yageo RT series with ±0.1% tolerance and ±25ppm/°C TCR, accepting a minor resistance deviation.
Change in resistance value, which could alter circuit timing, gain, or bias points.

Yageo
Strongest alternative with matched precision specs but slightly lower resistance.
| Feature / factor | ARG02BTC2493 | RT0402BRD07240KL | RT0402BRE07232KL | FRC0402F2433TS | Compatibility / risk |
|---|---|---|---|---|---|
| Resistance | 249kΩ | 240kΩ | 232kΩ | 243kΩ | 240kΩ / 232kΩ / 243kΩ — 3.6% lower than target. Requires circuit analysis.; RT0402BRE07232KL: 6.8% lower than target. Requires circuit analysis.; FRC0402F2433TS: 2.4% lower than target. |
| Tolerance | ±0.1% | ±0.1% | ±0.1% | ±1% | ±0.1% / ±1% — matched; RT0402BRE07232KL: matched; FRC0402F2433TS: Wider tolerance than target's ±0.1%. |
| Tcr | ±25ppm/°C | ±25 ppm/°C | ±25 ppm/°C | ±100 ppm/°C | ±25 ppm/°C / ±100 ppm/°C — matched; RT0402BRE07232KL: matched; FRC0402F2433TS: Higher TCR than target's ±25ppm/°C. |
| Technology | Thin Film | Thin Film | Thin Film | Thick Film | Thin Film / Thick Film — matched; RT0402BRE07232KL: matched; FRC0402F2433TS: Different technology, may affect noise/stability. |
| Package | 0402 | 0402 | 0402 | - | 0402 — matched; RT0402BRE07232KL: matched |
The best alternative found is Yageo's RT0402BRD07240KL. It matches the target's 0402 package, ±0.1% tolerance, and ±25ppm/°C TCR, with a resistance of 240kΩ (3.6% lower than 249kΩ). This small difference should be verified for your application.