1206W4F3903T5E
UNI ROYAL
Needs validationlow risk
A direct upgrade from the same manufacturer with a tighter ±1% tolerance, matching all other key specs.
Best Alternatives to 1206W4J0394T5E
The UNI-ROYAL 1206W4J0394T5E is a general-purpose 1206 thick film resistor with 390kΩ resistance, ±5% tolerance, and a 0.25W power rating. Several alternatives with tighter tolerance or different parameters are available for various application needs.
AI replacement insight
Electrical risklow
For tolerance upgrades, risk is low. For parametric changes, risk is medium and requires review.
Package risklow
All recommended alternatives use the same 1206 package, ensuring form-fit compatibility.
Can it be replaced directly?
Yes, several pin-compatible alternatives exist. For an upgrade, consider 1206W4F3903T5E (±1% tolerance). For a cross-vendor option, FOJAN FRC1206F3903TS is a strong match.
Best replacement path
The best upgrade is 1206W4F3903T5E from the same manufacturer, offering a tighter ±1% tolerance while matching all other specs.
Main risk
The main risk when substituting is ensuring any change in parameters, such as tighter tolerance or a different resistance value, is acceptable for the circuit's design.
Recommended alternatives
4Alternative comparison matrix
| Feature / factor | 1206W4J0394T5E | 1206W4F3903T5E | FRC1206F3903TS | RT1206BRD07390KL | Compatibility / risk |
|---|---|---|---|---|---|
| Tolerance | ±5% | ±1% | ±1% | ±0.1% | ±1% / ±0.1% — Tighter tolerance is a direct upgrade.; FRC1206F3903TS: Tighter tolerance is a potential upgrade.; RT1206BRD07390KL: Significantly higher precision.; FRC1206F3603TS: Tighter tolerance than target. |
| Package | 1206 | 1206 | 1206 | - | 1206 — Identical package and pinout.; FRC1206F3903TS: Identical package and pinout.; FRC1206F3603TS: matched |
| Power | 0.25 W | 0.25 W | 0.25 W | - | 0.25 W — matched; FRC1206F3903TS: matched |
| Resistance | 390 kΩ | 390 kΩ | 390 kΩ | - | 390 kΩ / 360 kΩ — matched; FRC1206F3903TS: matched; FRC1206F3603TS: Resistance is ~8% lower than target. |
| Manufacturer | UNI-ROYAL | UNI ROYAL | - | - | UNI ROYAL — Same manufacturer as target. |
| Technology | Thick Film | - | - | Thin Film | Thin Film — Different technology may affect noise and pulse handling. |
| Temperature | -55°C to +155°C | - | - | -55°C to +125°C | -55°C to +125°C — Reduced maximum operating temperature. |
| Tcr | Not specified | - | - | 25 ppm/°C | 25 ppm/°C — Significantly more stable over temperature. |
Application & sourcing insights
Questions & answers
The best alternative is 1206W4F3903T5E from UNI-ROYAL, which is an upgrade to ±1% tolerance from the same manufacturer. FRC1206F3903TS from FOJAN is another excellent cross-vendor option with ±1% tolerance.