Is there a pin-compatible replacement for AF0402FR-07243KL?

Yes, several 0402 package resistors are pin-compatible, such as AC0402FR-07249KL. However, 'pin-compatible' does not mean 'drop-in replacement'; electrical and feature differences must be reviewed.

What risks should I check before replacing AF0402FR-07243KL?

Key risks include: 1) The substitute may not be anti-sulfurated, risking failure in certain environments. 2) The resistance value may differ, affecting circuit performance. 3) The temperature coefficient (TCR) may vary.

AF0402FR-07243KL Alternatives, Datasheet & Cross Reference | Yageo

Finding a replacement for the Yageo AF0402FR-07243KL resistor requires matching its 243kΩ resistance, 1% tolerance, 0402 package, and key anti-sulfurated, AEC-Q200 features.

AI replacement insight

Sourcing riskhigh

The anti-sulfurated feature is specific and critical; general-purpose parts are not suitable substitutes.

Electrical riskmedium

Available alternatives have resistance values that deviate by 2-10%, requiring circuit analysis.

Package risklow

The 0402 package is standard, ensuring physical compatibility.

Can it be replaced directly?

No direct drop-in replacement has been identified. Alternatives exist but require careful review of electrical and environmental specifications.

Best replacement path

The closest alternatives are from Yageo's AC series, but they lack the anti-sulfurated feature and have different resistance values.

Main risk

The primary risk is the lack of anti-sulfurated protection in alternatives, which can lead to failure in high-sulfur environments.

Recommended alternatives

A parametric alternative with lower resistance (220kΩ vs 243kΩ) and no anti-sulfurated protection.

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Alternative comparison matrix

Feature / factor	AF0402FR-07243KL	AC0402FR-07220KL	AC0402FR-07249KL	Compatibility / risk
Package	0402	0402	0402	0402 — Package size matches.; AC0402FR-07249KL: Package size matches.
Resistance	243 kΩ	220 kΩ	249 kΩ	220 kΩ / 249 kΩ — 9.5% lower than target. Verify circuit tolerance.; AC0402FR-07249KL: 2.5% higher than target. Verify circuit tolerance.
Tolerance	±1%	±1%	±1%	±1% — Tolerance matches.; AC0402FR-07249KL: Tolerance matches.
Power	1/16 W	1/16 W	1/16 W	1/16 W — Power rating matches.; AC0402FR-07249KL: Power rating matches.
Application	Anti-Sulfurated	No	No	No — Candidate lacks the target's anti-sulfurated feature.; AC0402FR-07249KL: Candidate lacks the target's anti-sulfurated feature.

Application & sourcing insights

Questions & answers

Yageo's AC0402FR-07249KL is a close parametric match, but it lacks the anti-sulfurated feature. Engineering review is essential to ensure it meets your application's environmental requirements.