AC0603FR-07124KL
Yageo
Needs validationlow risk
A pin-compatible replacement with identical key parameters and added AEC-Q200 qualification.
Best Alternatives to RS-03K1243FT
RS-03K1243FT is a general-purpose 124kΩ 1% 0.1W thick film resistor in a 0603 package. Alternatives are available, including pin-compatible options and parametric variations that may require engineering review.
AI replacement insight
Electrical risklow
Low for pin-compatible matches. Medium for parametric alternatives with different resistance or technology.
Package risklow
All reviewed candidates use the same 0603 package, ensuring form-fit compatibility.
Sourcing risklow
This is a common resistor value with multiple manufacturers available.
Can it be replaced directly?
Yes, AC0603FR-07124KL by Yageo is a direct pin-to-pin replacement for RS-03K1243FT, matching package, resistance, tolerance, and power.
Best replacement path
AC0603FR-07124KL is a pin-compatible replacement with identical key electrical parameters and the added benefit of AEC-Q200 qualification.
Main risk
The main risk when substituting is using a part with a different nominal resistance value, which can alter circuit behavior.
Recommended alternatives
4Alternative comparison matrix
| Feature / factor | RS-03K1243FT | AC0603FR-07124KL | RT0603BRE07124KL | RS-03K1203FT | Compatibility / risk |
|---|---|---|---|---|---|
| Package | 0603 | 0603 | 0603 | 0603 | 0603 — Identical package and land pattern.; RT0603BRE07124KL: Identical package and land pattern.; RS-03K1203FT: Package is identical.; RS-03K1303FT: Package is identical. |
| Resistance | 124kΩ | 124kΩ | - | 120kΩ | 124kΩ / 120kΩ / 130kΩ — Nominal resistance is identical.; RS-03K1203FT: Resistance is ~3.2% lower.; RS-03K1303FT: Resistance is ~4.8% higher. |
| Tolerance | 1% | 1% | 0.1% | 1% | 1% / 0.1% — Resistance tolerance is identical.; RT0603BRE07124KL: Tighter tolerance is an upgrade.; RS-03K1203FT: Tolerance is identical.; RS-03K1303FT: Tolerance is identical. |
| Power | 0.1W | 0.1W | - | - | 0.1W — Power rating is identical. |
| Application | General Purpose | AEC-Q200 | - | - | AEC-Q200 — Candidate is automotive qualified. |
| Technology | Thick Film | - | Thin Film | - | Thin Film — May affect noise and pulse handling. |
| Tcr | ±100ppm/℃ | - | 50 ppm/°C | - | 50 ppm/°C — Improved temperature stability. |
Application & sourcing insights
Questions & answers
The best alternative is AC0603FR-07124KL from Yageo, which matches all key specifications and package, and is also AEC-Q200 qualified.