
FOJAN
A direct replacement from the same manufacturer series with improved tolerance and TCR.
Find verified substitutes for the FOJAN FRC0805J392TS, a 3.9kΩ 5% 0805 chip resistor. We've analyzed pin-compatible upgrades and parametric alternatives to ensure your project stays on track.
Many alternatives offer superior tolerance and TCR. Risk is low if nominal resistance is matched.
All suggested alternatives are in the same 0805 package.
Yes, FRC0805F3901TS is a direct pin-compatible replacement for FRC0805J392TS with improved electrical characteristics.
Use FRC0805F3901TS from the same manufacturer for a drop-in upgrade with better tolerance (1%).
The main risk is selecting a part with a different nominal resistance, which requires circuit re-evaluation.

FOJAN
A direct replacement from the same manufacturer series with improved tolerance and TCR.
| Feature / factor | FRC0805J392TS | FRC0805F3901TS | RS-05K3901FT | RT0805BRD073K9L | Compatibility / risk |
|---|---|---|---|---|---|
| Package | 0805 | 0805 | 0805 | 0805 | 0805 — Form factor matches.; RS-05K3901FT: Form factor matches.; RT0805BRD073K9L: Form factor matches.; RT0805BRD074K02L: Form factor matches. |
| Resistance | 3.9kΩ | 3.9kΩ | 3.9kΩ | 3.9kΩ | 3.9kΩ / 4.02kΩ — Nominal resistance matches.; RS-05K3901FT: Nominal resistance matches.; RT0805BRD073K9L: Nominal resistance matches.; RT0805BRD074K02L: 3% higher nominal resistance. |
| Power | 0.125W | 0.125W | 0.125W | 0.125W | 0.125W — Power rating matches.; RS-05K3901FT: Power rating matches.; RT0805BRD073K9L: Power rating matches. Catalog data conflict (1W) resolved to 1/8W from summary. |
| Tolerance | ±5% | ±1% | ±1% | ±0.1% | ±1% / ±0.1% — Improved precision.; RS-05K3901FT: Improved precision.; RT0805BRD073K9L: Significantly improved precision.; RT0805BRD074K02L: Significantly improved precision. |
| Tcr | ±400 ppm/°C | ±100 ppm/°C | ±100 ppm/°C | 25 ppm/°C | ±100 ppm/°C / 25 ppm/°C — Improved stability.; RS-05K3901FT: Improved stability.; RT0805BRD073K9L: Significantly improved stability.; RT0805BRD074K02L: Significantly improved stability. |
| Technology | Thick Film | - | - | Thin Film | Thin Film — Technology differs, may affect pulse handling. |
FRC0805F3901TS is the best alternative, offering a direct upgrade with ±1% tolerance from the same manufacturer series.