Is there a pin-compatible replacement for 0805W8F390KT5E?

Yes, parts like FRC0805F3R90TS share the same 0805 package and pinout. However, it is not a guaranteed drop-in replacement due to a difference in the temperature coefficient (TCR), which requires engineering review.

What risks should I check before replacing 0805W8F390KT5E?

Before replacing 0805W8F390KT5E, you must verify that the substitute's resistance, tolerance (±%), power rating (W), and temperature coefficient (TCR, in ppm/°C) meet your circuit's requirements.

0805W8F390KT5E Alternatives, Datasheet & Cross Reference | UNI-ROYAL

Finding a substitute for the 0805W8F390KT5E, a 3.9Ω 1% 0.125W 0805 chip resistor, involves matching key parameters. While several options exist, careful attention must be paid to the temperature coefficient (TCR) to ensure circuit stability.

AI replacement insight

Electrical riskmedium

Candidates have different TCR, tolerance, or resistance values.

Package risklow

All reviewed candidates use the same 0805 package.

Can it be replaced directly?

No direct drop-in replacement was identified. The closest candidates have parametric differences in TCR, tolerance, or resistance that require engineering review.

Best replacement path

FRC0805F3R90TS is the closest match if its higher TCR is acceptable for the application.

Main risk

The primary risk is substituting a part with a worse Temperature Coefficient (TCR), which can impact circuit performance and stability across different temperatures.

Recommended alternatives

Matches key electricals and package, but has a worse temperature coefficient (TCR) requiring review.

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Alternative comparison matrix

Feature / factor	0805W8F390KT5E	FRC0805F3R90TS	0805W8F360KT5E	FRC0805J3R9TS	Compatibility / risk
Resistance	3.9 Ω	3.9 Ω	3.6 Ω	3.9 Ω	3.9 Ω / 3.6 Ω — Exact match.; 0805W8F360KT5E: Resistance value is different, requires circuit analysis.; FRC0805J3R9TS: Exact match.
Tolerance	±1%	±1%	±1%	±5%	±1% / ±5% — Exact match.; 0805W8F360KT5E: Exact match.; FRC0805J3R9TS: Wider tolerance is a functional downgrade.
Power	0.125 W	0.125 W	0.125 W	0.125 W	0.125 W — Exact match.; 0805W8F360KT5E: Exact match.; FRC0805J3R9TS: Exact match.
Package	0805	0805	-	-	0805 — Same package ensures form-fit compatibility.
Tcr	≤ ±100 ppm/°C (inferred)	±400 ppm/°C	±100 ppm/°C	±400 ppm/°C	±400 ppm/°C / ±100 ppm/°C — Worse TCR may affect stability in precision circuits.; 0805W8F360KT5E: Matches inferred target TCR.; FRC0805J3R9TS: Worse TCR may affect stability.

Application & sourcing insights

Questions & answers

The best alternative is likely FRC0805F3R90TS, which matches resistance, tolerance, and power, but its temperature coefficient (TCR) is worse and must be validated for your application.