What risks should I check before replacing RC0402FR-073K9L?

First, ensure the package size matches (0402). Second, verify that the resistance (3.9kΩ) and tolerance (±1%) are correct. For precision applications, also confirm the Temperature Coefficient (TCR) is comparable (e.g., ±100 ppm/°C).

RC0402FR-073K9L Alternatives, Datasheet & Cross Reference | Yageo

Yageo's RC0402FR-073K9L is a common 3.9kΩ, 1%, 0.0625W thick film resistor in an 0402 package. Alternatives exist with matching specs, different packages, or slightly different resistance values.

AI replacement insight

Package riskhigh

Functional alternates have larger packages (0603, 0805) and require a board redesign.

Electrical riskmedium

Parametric alternatives have different resistance values; pin-compatible options require TCR verification.

Sourcing risklow

This is a very common resistor value and package, with many manufacturers available.

Can it be replaced directly?

Direct replacement for RC0402FR-073K9L should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

For a drop-in replacement, 0402WGF3901TCE is a strong candidate, but its TCR must be verified. If a board redesign is possible, larger package options offer higher power ratings.

Main risk

The main risks are package mismatch requiring a PCB redesign, or resistance deviation affecting circuit performance.

Recommended alternatives

Potential pin-compatible substitute with matching package, resistance, and power, but requires TCR verification.

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Alternative comparison matrix

Feature / factor	RC0402FR-073K9L	0402WGF3901TCE	RC0603FR-073K9L	RC0402FR-074K02L	Compatibility / risk
Package	0402	0402	-	-	0402 — Package size matches.
Resistance	3.9kΩ	3.9kΩ	-	-	4.02kΩ — Resistance is ~3% higher. Circuit analysis required.
Tolerance	±1%	±1%	-	-	±1% — Tolerance matches.
Power	0.0625W	0.0625W	-	-	0.0625W — Power rating matches.
Tcr	±100 ppm/°C	Unknown	-	-	±100 ppm/°C — TCR matches.

Application & sourcing insights

Questions & answers

Verified drop-in options for RC0402FR-073K9L are limited in the current batch. Review candidates marked Strong match or Datasheet verified, and validate package, pinout, and electrical limits before committing a BOM change.