Is there a pin-compatible replacement for AC0603FR-0739KL?

Yes, FRC0603F3902TS is pin-compatible, sharing the same 0603 package, 39kΩ resistance, and 1% tolerance. However, it is not a direct functional replacement for automotive applications as it lacks AEC-Q200 qualification.

What risks should I check before replacing AC0603FR-0739KL?

The main risk is using a non-automotive grade part in a design that requires AEC-Q200 compliance. You should also check for minor differences in resistance, tolerance, or technology (thick vs. thin film) that could affect circuit performance.

AC0603FR-0739KL Alternatives, Datasheet & Cross Reference | Yageo

AC0603FR-0739KL is a 39kΩ, 1% tolerance, 1/10W, 0603 package thick film chip resistor from Yageo. Its AEC-Q200 qualification makes it a reliable choice for automotive electronics.

AI replacement insight

Application riskhigh

Using a non-AEC-Q200 part in an automotive design is a major compliance and reliability risk.

Package risklow

All viable candidates match the 0603 package.

Electrical risklow

For non-auto use, parametric matches exist. For others, resistance/technology differences are minor.

Can it be replaced directly?

No direct drop-in replacement has been identified because all reviewed candidates lack the target's AEC-Q200 automotive qualification.

Best replacement path

For non-automotive applications, FRC0603F3902TS offers a near-identical parametric profile. For automotive use, a different AEC-Q200 qualified part must be sourced.

Main risk

The primary risk is the loss of automotive-grade (AEC-Q200) qualification, which can impact reliability and compliance in automotive systems.

Recommended alternatives

Parametrically identical but lacks the target's AEC-Q200 automotive qualification. Suitable for non-automotive applications.

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Alternative comparison matrix

Feature / factor	AC0603FR-0739KL	FRC0603F3902TS	RT0603BRD0739K2L	Compatibility / risk
Package	0603	0603	0603	0603 — Same package size and pin count.; RT0603BRD0739K2L: Same package size and pin count.
Resistance	39kΩ	39kΩ	39.2kΩ	39kΩ / 39.2kΩ — matched; RT0603BRD0739K2L: Slightly different resistance, but within target's ±1% tolerance band.
Tolerance	±1%	±1%	±0.1%	±1% / ±0.1% — matched; RT0603BRD0739K2L: Tighter tolerance is an upgrade.
Power	1/10W	1/10W	-	1/10W — matched
Application	AEC-Q200	Not specified	Not specified	Not specified — Target is AEC-Q200 qualified for automotive use, candidate is not.; RT0603BRD0739K2L: Target is AEC-Q200 qualified for automotive use, candidate is not.
Technology	Thick Film	-	Thin Film	Thin Film — Different film technology may affect noise and pulse handling.

Application & sourcing insights

Questions & answers

For non-automotive use, FRC0603F3902TS is the best alternative as it matches all key electrical parameters. If AEC-Q200 is required, no direct substitute was found in this review; a new search for AEC-Q200 parts is needed.