
FOJAN
A direct replacement with matching resistance, tolerance, power, TCR, and 0603 package.
RS-03K1301FT is a general-purpose 0603 chip resistor with 1.3kΩ resistance, ±1% tolerance, and a 100mW power rating. Several alternatives are available, including direct matches and high-precision upgrades.
Low for direct matches, medium for parts with different resistance values. Check circuit tolerance.
All suggested alternatives are in the same 0603 package, ensuring form and fit compatibility.
This is a common resistor value available from multiple manufacturers, ensuring a stable supply chain.
Direct replacement for RS-03K1301FT should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
For a direct replacement, use FRC0603F1301TS. For an upgrade in precision, use RT0603BRD071K3L.
The main risk when substituting is selecting a part with a different resistance value or a lower power rating, which can affect circuit function or reliability.

FOJAN
A direct replacement with matching resistance, tolerance, power, TCR, and 0603 package.
| Feature / factor | RS-03K1301FT | FRC0603F1301TS | RT0603BRD071K3L | FRC0603F1331TS | Compatibility / risk |
|---|---|---|---|---|---|
| Package | 0603 | 0603 | 0603 | 0603 | 0603 — Same package and pin count.; RT0603BRD071K3L: Same package and pin count.; FRC0603F1331TS: Same package and pin count. |
| Resistance | 1.3kΩ | 1.3kΩ | 1.3kΩ | 1.33kΩ | 1.3kΩ / 1.33kΩ — Resistance value matches.; RT0603BRD071K3L: Resistance value matches.; FRC0603F1331TS: Resistance is 2.3% higher. |
| Power | 0.1W | 0.1W | 0.1W | 0.1W | 0.1W — Power rating matches.; RT0603BRD071K3L: Power rating matches.; FRC0603F1331TS: Power rating matches. |
| Tolerance | ±1.0% | ±1.0% | ±0.1% | ±1.0% | ±1.0% / ±0.1% — Resistance tolerance matches.; RT0603BRD071K3L: Tighter tolerance provides higher precision.; FRC0603F1331TS: Resistance tolerance matches. |
| Tcr | ±100ppm/℃ | ±100 ppm/°C | 25 ppm/°C | - | ±100 ppm/°C / 25 ppm/°C — Temperature coefficient matches.; RT0603BRD071K3L: Lower TCR provides better stability over temperature. |
Verified drop-in options for RS-03K1301FT 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.