RS-03K3902FT
FH (Guangdong Fenghua Advanced Tech)
Needs validationlow risk
A strong pin-to-pin match from FH with identical key electrical parameters and package.
Best Alternatives to WR06X3902FTL
WR06X3902FTL is a general-purpose 39kΩ, 1%, 0.1W resistor in a standard 0603 package. Multiple pin-compatible replacements and automotive-grade upgrades are readily available from various manufacturers.
AI replacement insight
Electrical risklow
For pin-compatible matches, electrical risk is minimal. For parametric alternatives, resistance and tolerance must be verified.
Package risklow
All reviewed candidates use the same 0603 package, eliminating physical compatibility issues.
Can it be replaced directly?
Direct replacement for WR06X3902FTL should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
Best replacement path
AC0603FR-0739KL from Yageo is the best replacement, offering a direct parametric match and an upgrade to automotive-grade (AEC-Q200) reliability.
Main risk
The main risk is using a substitute with incorrect resistance or wider tolerance. Alternatives with different resistance values or 5% tolerance are available but require circuit validation.
Recommended alternatives
3Alternative comparison matrix
| Feature / factor | WR06X3902FTL | RS-03K3902FT | AC0603FR-0739KL | FRC0603F3902TS | Compatibility / risk |
|---|---|---|---|---|---|
| Package | 0603 (1608 metric) | 0603 | 0603 | 0603 | 0603 — Identical package ensures form-fit compatibility.; AC0603FR-0739KL: Identical package ensures form-fit compatibility.; FRC0603F3902TS: Identical package. |
| Resistance | 39kΩ | 39kΩ | 39kΩ | 39kΩ | 39kΩ — Resistance value is identical.; AC0603FR-0739KL: Resistance value is identical.; FRC0603F3902TS: Identical resistance. |
| Tolerance | ±1% | ±1% | - | - | ±1% — Tolerance is identical. |
| Power | 0.1W | 0.1W | 0.1W | 0.1W (conflicting data) | 0.1W / 0.1W (conflicting data) — Power rating is identical.; AC0603FR-0739KL: Power rating matches. Internal data conflict (1.0W) noted but considered an error.; FRC0603F3902TS: Likely 0.1W, but internal data shows 1.0W. Requires datasheet check. |
| Tcr | ≤ ±100 ppm/°C | ±100ppm/℃ | - | - | ±100ppm/℃ — Temperature coefficient matches target specification. |
| Application | General Purpose | - | AEC-Q200 | - | AEC-Q200 — Automotive grade offers higher reliability. |
Application & sourcing insights
Questions & answers
Verified drop-in options for WR06X3902FTL 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.