
FOJAN
Form-fit alternate with same resistance and power, but wider tolerance (±5% vs ±1%).
Find and compare alternatives for the 25121WF5101T4E, a 1W, 5.1kΩ, 1% thick film resistor in a 2512 package. Review parametric alternatives and potential risks before substitution.
Candidates have different resistance or wider tolerance.
Kept candidates match the 2512 package.
No direct, 1-to-1 replacement has been identified. All candidates require engineering review due to parametric differences.
Parametric alternatives with different resistance or tolerance.
Parametric mismatch in resistance or tolerance.

FOJAN
Form-fit alternate with same resistance and power, but wider tolerance (±5% vs ±1%).
| Feature / factor | 25121WF5101T4E | FRC2512J512 TS | RC-12K512JT | FRC2512F4701TS | Compatibility / risk |
|---|---|---|---|---|---|
| Package | 2512 | 2512 | 2512 | 2512 | 2512 — Same EIA package size.; RC-12K512JT: Same EIA package size.; FRC2512F4701TS: Same EIA package size.; RC2512FK-074K7L: Same EIA package size. |
| Resistance | 5.1 kΩ | 5.1 kΩ | 5.1 kΩ | 4.7 kΩ | 5.1 kΩ / 4.7 kΩ — Resistance value matches.; RC-12K512JT: Resistance value matches.; FRC2512F4701TS: Different resistance value.; RC2512FK-074K7L: Different resistance value. |
| Power | 1 W | 1 W | 1 W | 1 W | 1 W — Power rating matches.; RC-12K512JT: Power rating matches.; FRC2512F4701TS: Power rating matches.; RC2512FK-074K7L: Power rating matches. |
| Tolerance | ±1% | ±5% | ±5% | ±1% | ±5% / ±1% — Wider tolerance, requires review.; RC-12K512JT: Wider tolerance, requires review.; FRC2512F4701TS: Tolerance matches.; RC2512FK-074K7L: Tolerance matches. |
No direct drop-in replacement was found. Alternatives exist with different resistance values or wider tolerances. For example, RC2512FK-074K7L matches power and tolerance but has a 4.7kΩ resistance. Review is required.