Is there a pin-compatible replacement for RT0402BRD073K9L?

Yes, several 0402 package resistors are pin-compatible. However, none are exact functional drop-in replacements. All require review for parametric differences like resistance value, tolerance, or temperature coefficient (TCR).

What risks should I check before replacing RT0402BRD073K9L?

Key risks include: 1) Resistance Mismatch: Ensure your circuit tolerates a different nominal resistance. 2) Precision Downgrade: Check if wider tolerance (e.g., ±1% vs ±0.1%) or higher TCR (e.g., ±100 vs 25 ppm/°C) affects performance. 3) Technology: A switch from thin film to thick film can impact noise and long-term stability.

RT0402BRD073K9L Alternatives, Datasheet & Cross Reference | Yageo

Yageo's RT0402BRD073K9L is a high-precision 3.9kΩ thin-film chip resistor in a 0402 package, featuring a tight ±0.1% tolerance and a low 25 ppm/°C TCR for stable, critical applications.

AI replacement insight

Electrical riskhigh

Mismatches in tolerance, TCR, and resistance value require careful circuit analysis.

Package risklow

All viable candidates are in the same 0402 package.

Sourcing riskmedium

High-precision resistors can have more limited availability than general-purpose ones.

Can it be replaced directly?

No direct, drop-in replacement has been identified. All candidates require engineering review due to differences in resistance value or precision specifications.

Best replacement path

For applications tolerant of a ~5% resistance shift, Yageo's RT0402BRD073K7L (3.7kΩ) offers identical precision. Otherwise, a general-purpose 3.9kΩ resistor like AC0402FR-073K9L can be used if the circuit can tolerate ±1% tolerance and ±100 ppm/°C TCR.

Main risk

The primary risk is a loss of circuit precision. The target has a very tight tolerance (±0.1%) and low TCR (25 ppm/°C), which most alternatives do not match.

Recommended alternatives

Same precision series and package, but with a 3.7kΩ resistance value. Requires engineering validation.

View details

Alternative comparison matrix

Feature / factor	RT0402BRD073K9L	RT0402BRD073K7L	AC0402FR-073K9L	FRC0402F3901TS	Compatibility / risk
Package	0402	0402	0402	0402	0402 — Package size matches.; AC0402FR-073K9L: Package size matches.; FRC0402F3901TS: Package size matches.
Resistance	3.9 kΩ	3.7 kΩ	3.9 kΩ	3.9 kΩ	3.7 kΩ / 3.9 kΩ — Resistance differs by ~5.1%.; AC0402FR-073K9L: Nominal resistance matches.; FRC0402F3901TS: Nominal resistance matches.
Tolerance	±0.1%	±0.1%	±1%	±1%	±0.1% / ±1% — Precision tolerance matches.; AC0402FR-073K9L: Candidate tolerance is significantly wider.; FRC0402F3901TS: Candidate tolerance is significantly wider.
Tcr	25 ppm/°C	25 ppm/°C	±100 ppm/°C	±100 ppm/°C	25 ppm/°C / ±100 ppm/°C — Low TCR matches.; AC0402FR-073K9L: Candidate TCR indicates lower stability.; FRC0402F3901TS: Candidate TCR indicates lower stability.
Technology	Thin Film	Thin Film	-	Thick Film	Thin Film / Thick Film — Technology matches.; FRC0402F3901TS: Different resistor technology may affect noise/stability.
Application	Standard	-	AEC-Q200	-	AEC-Q200 — Candidate is automotive qualified, target is not.

Application & sourcing insights

Questions & answers

The best alternative depends on your circuit's needs. If precision is key but the resistance value can vary slightly, RT0402BRD073K7L (3.7kΩ) is a strong option. If the 3.9kΩ value is critical but precision is not, AC0402FR-073K9L is a possible substitute.