FRC1206F3901TS
FOJAN
Needs validationhigh risk
A functional alternative with matching resistance and package, but is a downgrade in tolerance (1% vs 0.1%) and TCR.
Best Alternatives to RT1206BRD073K9L
RT1206BRD073K9L is a high-precision 3.9kΩ thin film resistor. Finding a direct replacement requires matching its tight ±0.1% tolerance and low 25 ppm/°C temperature coefficient.
AI replacement insight
Electrical riskhigh
Substituting a precision thin film resistor with a general-purpose thick film part can impact circuit performance, especially in analog, measurement, or feedback applications.
Package risklow
All candidates share the same 1206 package, ensuring physical compatibility on the PCB.
Can it be replaced directly?
No direct, verified drop-in replacements were found. All available candidates are general-purpose thick film resistors and are significant downgrades in precision and stability.
Best replacement path
Search for thin film resistors with 3.9kΩ resistance, ±0.1% tolerance, and a TCR of 25 ppm/°C or better in a 1206 package.
Main risk
Loss of circuit precision and stability due to higher tolerance, higher temperature coefficient (TCR), and different resistor technology (thick film vs. thin film).
Recommended alternatives
4Alternative comparison matrix
| Feature / factor | RT1206BRD073K9L | FRC1206F3901TS | RC1206FR-073K9L | FRC1206J392 TS | Compatibility / risk |
|---|---|---|---|---|---|
| Resistance | 3.9kΩ | 3.9kΩ | 3.9kΩ | 3.9kΩ | 3.9kΩ — matched; RC1206FR-073K9L: matched; FRC1206J392 TS: matched; 1206W4J0392T5E: matched |
| Tolerance | ±0.1% | ±1% | ±1% | ±5% | ±1% / ±5% — Significant downgrade in precision.; RC1206FR-073K9L: Significant downgrade in precision.; FRC1206J392 TS: Significant downgrade in precision.; 1206W4J0392T5E: Significant downgrade in precision. |
| Tcr | 25 ppm/°C | ±100 ppm/°C | ±100 ppm/°C | ±100 ppm/°C | ±100 ppm/°C / Not specified — Lower stability over temperature.; RC1206FR-073K9L: Lower stability over temperature.; FRC1206J392 TS: Lower stability over temperature.; 1206W4J0392T5E: TCR is missing, assume standard thick film (worse). |
| Technology | Thin Film | Thick Film | Thick Film | Thick Film | Thick Film — Affects noise and stability.; RC1206FR-073K9L: Affects noise and stability.; FRC1206J392 TS: Affects noise and stability.; 1206W4J0392T5E: Affects noise and stability. |
| Package | 1206 | 1206 | 1206 | 1206 | 1206 — matched; RC1206FR-073K9L: matched; FRC1206J392 TS: matched; 1206W4J0392T5E: matched |
Application & sourcing insights
Questions & answers
The best alternatives are other thin film resistors in a 1206 package with 3.9kΩ resistance, ±0.1% tolerance, and a TCR of 25 ppm/°C or lower. No such parts were found in this batch; all are lower-spec thick film parts.