Is there a pin-compatible replacement for RC0402FR-073R9L?

Yes, parts like FOJAN FRC0402F3R90TS and UNI-ROYAL 0402WGF390KTCE are pin-compatible in the 0402 package. However, their electrical parameters like TCR and power handling must be carefully reviewed.

What risks should I check before replacing RC0402FR-073R9L?

The main risks are a weaker Temperature Coefficient (TCR), which affects resistance stability, and not having an increased power rating, which could reduce thermal margin. Always verify these in your application.

RC0402FR-073R9L Alternatives, Datasheet & Cross Reference | Yageo

Find alternatives for the Yageo RC0402FR-073R9L 3.9Ω resistor. While several parts match key specs, they may have different temperature coefficients (TCR) or require careful power derating.

AI replacement insight

Electrical riskmedium

Candidates have weaker or unknown TCR and no increased power rating.

Package risklow

All viable candidates share the same 0402 package.

Can it be replaced directly?

Yes, there are several pin-compatible alternatives like FRC0402F3R90TS. However, they are considered parametrically relaxed due to differences in TCR and not meeting a 1.5x power safety margin.

Best replacement path

FOJAN FRC0402F3R90TS is a close match but with a weaker TCR. For higher reliability, upgrade to a 0.1W rated part with a matching TCR.

Main risk

Weaker temperature stability (TCR) and reduced thermal margin are the primary risks.

Recommended alternatives

Matches resistance and package, but has a weaker TCR and does not provide an increased power margin.

View details

Alternative comparison matrix

Feature / factor	RC0402FR-073R9L	FRC0402F3R90TS	0402WGF390KTCE	Compatibility / risk
Package	0402	0402 (1005 Metric)	0402	0402 (1005 Metric) — Form and fit are identical.; 0402WGF390KTCE: Form and fit are identical.
Resistance	3.9 Ohm	3.9 Ω	3.9 Ω	3.9 Ω — matched; 0402WGF390KTCE: matched
Tolerance	±1%	±1%	±1%	±1% — matched; 0402WGF390KTCE: matched
Power	0.0625 W	0.0625 W	0.0625 W	0.0625 W — Identical rating, does not meet 1.5x safety margin rule.; 0402WGF390KTCE: Identical rating, does not meet 1.5x safety margin rule.
Tcr	±200 ppm/°C	±400 ppm/°C	Not specified	±400 ppm/°C / Not specified — Higher TCR may affect stability in temperature-sensitive circuits.; 0402WGF390KTCE: TCR must be verified from datasheet.

Application & sourcing insights

Questions & answers

FOJAN FRC0402F3R90TS is a potential alternative, but has a higher TCR. For critical designs, consider parts with a power rating of at least 0.1W (1/10W) and a matching TCR of ±200 ppm/°C.