Is there a pin-compatible replacement for RT0402BRE0749R9L?

Yes, RT0402BRD0749R9L from Yageo is a pin-compatible replacement in the same 0402 package. It matches all key electricals and offers a better TCR.

What risks should I check before replacing RT0402BRE0749R9L?

The main risks are using a substitute with wider tolerance (e.g., ±1% vs ±0.1%), higher TCR, or different technology (Thick Film vs Thin Film), which can impact circuit accuracy and stability.

RT0402BRE0749R9L Alternatives, Datasheet & Cross Reference | Yageo

The Yageo RT0402BRE0749R9L is a precision 49.9 Ohm thin-film chip resistor in a 0402 package, valued for its ±0.1% tolerance and 50 ppm/°C TCR. Finding a substitute requires matching these precision characteristics.

AI replacement insight

Electrical riskhigh

High risk if using a substitute with relaxed tolerance or TCR, impacting circuit accuracy.

Package risklow

Low risk as 0402 is a standard package and all viable candidates match it.

Can it be replaced directly?

Yes, Yageo RT0402BRD0749R9L is a direct replacement that is pin-compatible and offers improved performance.

Best replacement path

The best path is to use Yageo RT0402BRD0749R9L, which is a pin-compatible upgrade with a better TCR.

Main risk

The primary risk is substituting with a general-purpose resistor, which will degrade circuit precision due to wider tolerance and TCR.

Recommended alternatives

Yageo RT0402BRD0749R9L is a strong match with identical key parameters and an improved TCR of 25 ppm/°C.

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Alternative comparison matrix

Feature / factor	RT0402BRE0749R9L	RT0402BRD0749R9L	RTT0249R9FTH	Compatibility / risk
Package	0402	0402	0402	0402 — Identical package and pinout.; RTT0249R9FTH: Package is a match.
Resistance	49.9 Ohm	49.9 Ohm	49.9 Ohm	49.9 Ohm — Resistance value is identical.; RTT0249R9FTH: Resistance value is identical.
Tolerance	±0.1%	±0.1%	±1%	±0.1% / ±1% — Tolerance is identical.; RTT0249R9FTH: Tolerance is 10x wider, a significant downgrade in precision.
Tcr	50 ppm/°C	25 ppm/°C	-	25 ppm/°C — Candidate has a better (lower) TCR, indicating higher stability.
Technology	Thin Film	Thin Film	Thick Film	Thin Film / Thick Film — Technology is identical.; RTT0249R9FTH: Different technology implies lower stability and higher noise.

Application & sourcing insights

Questions & answers

Yageo's RT0402BRD0749R9L is an excellent alternative, offering identical specifications with an improved TCR. For less critical applications, other parts may be considered with careful review.