Is there a pin-compatible replacement for AC0402FR-0712K1L?

Yes, parts like RT0402BRD0712K1L are pin-compatible in the 0402 package. However, 'pin-compatible' does not mean 'drop-in replacement' as this substitute lacks the target's automotive qualification.

What risks should I check before replacing AC0402FR-0712K1L?

The primary risk is the lack of AEC-Q200 automotive qualification in the suggested alternatives. You must also consider the technology change from thick film to thin film, which may affect pulse handling.

AC0402FR-0712K1L Alternatives, Datasheet & Cross Reference | Yageo

Finding a substitute for the Yageo AC0402FR-0712K1L involves balancing electrical parameters with application requirements. While several resistors offer similar performance, the key difference is the AEC-Q200 automotive qualification.

AI replacement insight

Application riskhigh

Candidates lack AEC-Q200 qualification required for automotive use.

Electrical risklow

Candidates offer similar or superior electrical performance (tolerance, TCR).

Package risklow

All candidates match the 0402 package, ensuring physical compatibility.

Can it be replaced directly?

No direct, AEC-Q200 qualified drop-in replacement was found. The best alternatives are commercial-grade resistors that require engineering validation if used in automotive applications.

Best replacement path

For non-automotive designs, RT0402BRD0712K1L offers the same resistance with improved tolerance and TCR. For automotive designs, a search for another 'AC' series or AEC-Q200 qualified part is recommended.

Main risk

Using a non-AEC-Q200 qualified part in an automotive application.

Recommended alternatives

Matches resistance and package, with better tolerance/TCR, but lacks automotive qualification.

View details

Alternative comparison matrix

Feature / factor	AC0402FR-0712K1L	RT0402BRD0712K1L	RT0402BRD0712KL	Compatibility / risk
Resistance	12.1 kΩ	12.1 kΩ	12.0 kΩ	12.1 kΩ / 12.0 kΩ — Resistance value matches target.; RT0402BRD0712KL: Resistance differs by -0.8%, within target's tolerance.
Application	AEC-Q200 Qualified	AEC-Q200 Not Qualified	AEC-Q200 Not Qualified	AEC-Q200 Not Qualified — Candidate is commercial grade, target is automotive.; RT0402BRD0712KL: Candidate is commercial grade, target is automotive.
Tolerance	±1.0%	±0.1%	±0.1%	±0.1% — Tighter tolerance is a performance upgrade.; RT0402BRD0712KL: Tighter tolerance is a performance upgrade.
Tcr	±100 ppm/°C	25 ppm/°C	25 ppm/°C	25 ppm/°C — Lower TCR provides better stability over temperature.; RT0402BRD0712KL: Lower TCR provides better stability.
Package	0402	0402	0402	0402 — Package size matches.; RT0402BRD0712KL: Package size matches.

Application & sourcing insights

Questions & answers

For non-automotive use, RT0402BRD0712K1L is the best alternative, matching the 12.1kΩ resistance with better tolerance and TCR. However, it is not AEC-Q200 qualified.