Is there a pin-compatible replacement for RT0402BRD0749K9L?

Yes, any 0402 chip resistor is physically pin-compatible. However, electrical characteristics like resistance, tolerance, and TCR are critical for this precision part and are not identical across all candidates.

What risks should I check before replacing RT0402BRD0749K9L?

The main risks are changes in circuit behavior due to different resistance values, reduced precision from a looser tolerance (e.g., 1% vs 0.1%), and poor temperature stability from a higher TCR (e.g., 100ppm/°C vs 25ppm/°C).

RT0402BRD0749K9L Alternatives, Datasheet & Cross Reference | Yageo

Find and evaluate alternatives for the Yageo RT0402BRD0749K9L, a 49.9kΩ 0.1% precision resistor. This guide helps you compare key parameters like resistance, tolerance, and TCR to ensure your circuit's performance is maintained.

AI replacement insight

Electrical riskhigh

Target is a precision resistor. Mismatches in resistance, tolerance, or TCR can impact circuit performance.

Package risklow

All candidates use the standard 0402 package, ensuring physical compatibility.

Can it be replaced directly?

No direct, 1-to-1 replacement was found. All candidates require engineering review due to parametric differences, primarily in resistance value.

Best replacement path

Use another precision thin-film 0402 resistor with the same 49.9kΩ value, or evaluate close-value parts from the same Yageo RT series if the circuit allows.

Main risk

Degradation of circuit precision due to differences in resistance, tolerance, and temperature stability (TCR).

Recommended alternatives

AEC-Q200 qualified alternative with similar precision specs but 45.3kΩ resistance.

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Alternative comparison matrix

Feature / factor	RT0402BRD0749K9L	AT0402BRD0745K3L	RT0402BRD0747KL	RT0402BRD0751KL	Compatibility / risk
Resistance	49.9 kΩ	45.3 kΩ	47 kΩ	51 kΩ	45.3 kΩ / 47 kΩ / 51 kΩ — ~9.2% lower. Verify circuit tolerance.; RT0402BRD0747KL: ~5.8% lower. Verify circuit tolerance.; RT0402BRD0751KL: ~2.2% higher. Verify circuit tolerance.
Tolerance	±0.1%	±0.1%	±0.1%	±0.1%	±0.1% — Precision matches target.; RT0402BRD0747KL: Precision matches target.; RT0402BRD0751KL: Precision matches target.
Application	Commercial	AEC-Q200	-	-	AEC-Q200 — Automotive grade may be an upgrade.
Package	0402	0402	0402	0402	0402 — Same package size.; RT0402BRD0747KL: Same package size.; RT0402BRD0751KL: Same package size.
Tcr	25 ppm/°C	-	25 ppm/°C	25 ppm/°C	25 ppm/°C — Temperature stability matches.; RT0402BRD0751KL: Temperature stability matches.
Technology	Thin Film	-	-	Thin Film	Thin Film — Matches precision technology.

Application & sourcing insights

Questions & answers

No direct drop-in replacement was found. The best alternatives are other parts in Yageo's RT0402B series, like RT0402BRD0751KL (51kΩ), if your circuit can tolerate a small resistance change. Always verify performance.