Is there a pin-compatible replacement for 1206W4F3903T5E?

Yes, FRC1206F3903TS is a pin-compatible replacement. It has the same 1206 package, resistance, tolerance, and power rating, making it a direct substitute.

What risks should I check before replacing 1206W4F3903T5E?

Before replacing, verify the substitute's tolerance (e.g., ±5% vs ±1%), technology (Thin Film vs. Thick Film), and temperature coefficient (TCR) to ensure they meet your circuit's requirements.

1206W4F3903T5E Alternatives, Datasheet & Cross Reference | UNI-ROYAL

Find and compare verified substitutes for the UNI ROYAL 1206W4F3903T5E, a 390kΩ 1% 0.25W 1206 thick film resistor. This page provides pin-compatible replacements, upgrade paths, and parametric alternatives to ensure design continuity.

AI replacement insight

Package risklow

Multiple 1206 package alternatives are available.

Electrical riskmedium

Some alternatives have different tolerance or technology. These must be reviewed by an engineer.

Can it be replaced directly?

Yes, FRC1206F3903TS is a direct pin-to-pin replacement for 1206W4F3903T5E, matching resistance, tolerance, power, and package.

Best replacement path

The best path is a pin-compatible part like FRC1206F3903TS, which matches all key electrical and physical parameters.

Main risk

The main risk is using a part with relaxed parameters, such as wider tolerance (e.g., ±5%) or different technology (Thin Film), without circuit validation.

Recommended alternatives

A pin-compatible 390kΩ 1% 0.25W 1206 resistor from FOJAN, matching all key specifications of the target part.

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Alternative comparison matrix

Feature / factor	1206W4F3903T5E	FRC1206F3903TS	1206W4J0394T5E	RT1206BRD07390KL	Compatibility / risk
Package	1206	1206	1206	1206	1206 — Identical package ensures form and fit compatibility.; 1206W4J0394T5E: Package is a physical match.; RT1206BRD07390KL: Package is a physical match.
Resistance	390 kΩ	390 kΩ	-	-	390 kΩ — Resistance value matches the target.
Tolerance	±1%	±1%	±5%	±0.1%	±1% / ±5% / ±0.1% — Resistance tolerance matches the target.; 1206W4J0394T5E: Wider tolerance is a performance downgrade.; RT1206BRD07390KL: Tighter tolerance is a performance upgrade.
Power	0.25 W	0.25 W	0.25 W	-	0.25 W — Power rating matches the target.; 1206W4J0394T5E: Power rating matches the target.
Tcr	±100 ppm/°C	±100 ppm/°C	-	25 ppm/°C	±100 ppm/°C / 25 ppm/°C — Temperature coefficient matches the target.; RT1206BRD07390KL: Lower TCR provides better stability over temperature.
Manufacturer	UNI-ROYAL	-	UNI-ROYAL	-	UNI-ROYAL — Same manufacturer as target.
Technology	Thick Film	-	-	Thin Film	Thin Film — Different technology may affect pulse handling or noise.

Application & sourcing insights

Questions & answers

The best alternative is FRC1206F3903TS, which is a pin-compatible replacement matching all key specifications including resistance, tolerance, power rating, and package size.