RC0603FR-0746K4L
Yageo
Needs validationmedium risk
A general-purpose resistor with similar package and power, but lower resistance and lacks automotive qualification.
Best Alternatives to AC0603FR-0749K9L
Yageo's AC0603FR-0749K9L is an automotive-grade 49.9kΩ chip resistor. Finding a substitute requires careful attention to its AEC-Q200 qualification, as direct drop-in replacements are not readily available.
AI replacement insight
Electrical riskhigh
Candidates have different resistance values or technology (Thin Film), requiring circuit validation.
Package risklow
All candidates share the same 0603 package, ensuring physical compatibility.
Sourcing riskhigh
Using a non-qualified part in an automotive design violates standards and introduces reliability risk.
Can it be replaced directly?
No direct, drop-in replacement has been identified. All candidates lack the target's AEC-Q200 automotive qualification and require engineering review before use.
Best replacement path
Search for another AEC-Q200 qualified 0603 resistor with 49.9kΩ, ±1% specs, such as from Yageo's 'AC' series or equivalent automotive series from other manufacturers (e.g., Vishay, KOA, Panasonic).
Main risk
The primary risk is substituting a commercial-grade resistor into an automotive application, which can lead to reliability issues or failure to meet system-level requirements.
Recommended alternatives
5Alternative comparison matrix
| Feature / factor | AC0603FR-0749K9L | RC0603FR-0746K4L | RC0603FR-0752K3L | RT0603BRD0745K3L | Compatibility / risk |
|---|---|---|---|---|---|
| Package | 0603 | 0603 | 0603 | 0603 | 0603 — Form factor is identical.; RC0603FR-0752K3L: Form factor is identical.; RT0603BRD0745K3L: Form factor is identical.; RT0603BRD0747K5L: Form factor is identical. |
| Resistance | 49.9kΩ | 46.4kΩ | 52.3kΩ | 45.3kΩ | 46.4kΩ / 52.3kΩ / 45.3kΩ / 47.5kΩ — -7.0% deviation from target.; RC0603FR-0752K3L: +4.8% deviation from target.; RT0603BRD0745K3L: -9.2% deviation from target.; RT0603BRD0747K5L: -4.8% deviation from target. |
| Tolerance | ±1% | ±1% | ±1% | ±0.1% | ±1% / ±0.1% — Same precision.; RC0603FR-0752K3L: Same precision.; RT0603BRD0745K3L: Higher precision than target.; RT0603BRD0747K5L: Higher precision than target. |
| Qualification | AEC-Q200 | Commercial | Commercial | Commercial | Commercial — Lacks AEC-Q200 automotive grade.; RC0603FR-0752K3L: Lacks AEC-Q200 automotive grade.; RT0603BRD0745K3L: Lacks AEC-Q200 automotive grade.; RT0603BRD0747K5L: Lacks AEC-Q200 automotive grade. |
| Power | 0.1W | - | 0.1W | - | 0.1W — Same power rating. |
| Technology | Thick Film | - | - | Thin Film | Thin Film — Different technology may affect stability and failure modes.; RT0603BRD0747K5L: Different technology may affect stability and failure modes. |
Application & sourcing insights
Questions & answers
No direct drop-in replacement is available. The best alternatives are other AEC-Q200 qualified 49.9kΩ 0603 resistors. For non-automotive use, Yageo's RC0603FR-0746K4L is a close parametric match that requires review.