What risks should I check before replacing 1206W4F390KT5E?

Before replacing, check for parametric differences. For alternatives like FRC1206J3R9 TS, verify if a wider tolerance (±5%) is acceptable. For others, confirm if a different temperature coefficient (TCR) or a slightly different resistance value meets your circuit's requirements.

1206W4F390KT5E Alternatives, Datasheet & Cross Reference | UNI-ROYAL

Find verified substitutes for the UNI-ROYAL 1206W4F390KT5E, a 3.9Ω 1% 0.25W 1206 thick film resistor. Review pin-compatible and parametric alternatives from Yageo, FOJAN, and more.

AI replacement insight

Electrical risklow

Low for RC1206FR-073R9L; medium for others due to TCR, tolerance, or resistance differences.

Package risklow

All reviewed candidates use the same 1206 package, ensuring form-fit compatibility.

Can it be replaced directly?

Direct replacement for 1206W4F390KT5E should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

The Yageo RC1206FR-073R9L is the strongest candidate, matching all key electrical parameters and package.

Main risk

The primary risk involves using parametric alternatives with wider tolerance (e.g., ±5%) or different resistance values, which can impact circuit performance.

Recommended alternatives

Strong alternative with matching resistance, tolerance, power, and package. Requires TCR verification.

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Alternative comparison matrix

Feature / factor	1206W4F390KT5E	RC1206FR-073R9L	FRC1206F3R90TS	FRC1206J3R9 TS	Compatibility / risk
Package	1206 (3216 Metric)	1206	1206	1206	1206 — Package size matches.; FRC1206F3R90TS: Package size matches.; FRC1206J3R9 TS: Package size matches.
Resistance	3.9 Ω	3.9 Ω	3.9 Ω	3.9 Ω	3.9 Ω — Resistance value matches.; FRC1206F3R90TS: Resistance value matches.; FRC1206J3R9 TS: Resistance value matches.
Tolerance	±1%	±1%	±1%	±5%	±1% / ±5% — Resistance tolerance matches.; FRC1206F3R90TS: Resistance tolerance matches.; FRC1206J3R9 TS: Wider tolerance is a downgrade.
Power	0.25 W	0.25 W	-	-	0.25 W — Power rating matches.
Tcr	Not specified	±200 ppm/°C	±400 ppm/°C	-	±200 ppm/°C / ±400 ppm/°C — Target TCR not specified; verify candidate's TCR is acceptable.; FRC1206F3R90TS: Candidate TCR may be higher than target's.

Application & sourcing insights

Questions & answers

Verified drop-in options for 1206W4F390KT5E 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.