What risks should I check before replacing FRC0805F3R90TS?

Before replacing, verify that the substitute's resistance tolerance (ideally ±1% or better) and power rating (0.125W or higher) are suitable. Also check the temperature coefficient (TCR) if your application is sensitive to temperature changes.

FRC0805F3R90TS Alternatives, Datasheet & Cross Reference | FOJAN

The FOJAN FRC0805F3R90TS is a general-purpose 3.9Ω, 1% tolerance, 0.125W thick film resistor in a standard 0805 package. Finding a suitable replacement involves matching these key parameters.

AI replacement insight

Electrical riskmedium

Substituting with incorrect resistance or wider tolerance can alter circuit behavior.

Package risklow

The 0805 package is highly standardized, minimizing placement issues.

Can it be replaced directly?

Yes, 0805W8F390KT5E from UNI-ROYAL is a potential pin-to-pin replacement, pending verification of its temperature coefficient (TCR).

Best replacement path

The UNI-ROYAL 0805W8F390KT5E is a strong candidate, matching resistance, tolerance, power, and package.

Main risk

The primary risk is using a part with a different resistance value or a wider tolerance, which could affect circuit performance.

Recommended alternatives

A potential pin-to-pin replacement matching package, resistance, tolerance, and power. TCR needs verification.

View details

Alternative comparison matrix

Feature / factor	FRC0805F3R90TS	0805W8F390KT5E	FRC0805J3R9TS	0805W8F360KT5E	Compatibility / risk
Package	0805	0805	0805	0805	0805 — Same 0805 package ensures form-fit compatibility.; FRC0805J3R9TS: Same 0805 package ensures form-fit compatibility.; 0805W8F360KT5E: Same 0805 package ensures form-fit compatibility.
Resistance	3.9 Ω	3.9 Ω	3.9 Ω	3.6 Ω	3.9 Ω / 3.6 Ω — Resistance value is identical.; FRC0805J3R9TS: Resistance value is identical.; 0805W8F360KT5E: Resistance value is lower than target.
Tolerance	±1%	±1%	±5%	±1%	±1% / ±5% — Tolerance is identical.; FRC0805J3R9TS: Wider tolerance may impact circuit precision.; 0805W8F360KT5E: Tolerance is identical.
Power	0.125 W	0.125 W	-	-	0.125 W — Power rating is identical.
Tcr	±400 ppm/°C	Unknown	±400 ppm/°C	±100 ppm/°C	Unknown / ±400 ppm/°C / ±100 ppm/°C — Candidate TCR not found in provided data, requires datasheet check.; FRC0805J3R9TS: Temperature coefficient is identical.; 0805W8F360KT5E: Offers a more stable performance over temperature.

Application & sourcing insights

Questions & answers

Verified drop-in options for FRC0805F3R90TS 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.