
UNI-ROYAL
Form-fit compatible with same power rating, but has a wider resistance tolerance of ±5%.
Reviewing alternatives for the UNI-ROYAL 181207F1001T4E, a 1kΩ ±1% 0.75W 1812 chip resistor. Key considerations for replacement are resistance tolerance and package compatibility.
Wider tolerance (±5%) on some candidates requires circuit validation.
Some alternatives are not in a 1812 package and require PCB redesign.
No direct pin-to-pin replacement with identical key parameters was found. Alternatives exist with relaxed tolerance (±5%) or different packages, requiring engineering review.
For applications tolerant of ±5% resistance, FRC1812J102 TS offers the same package and power. If ±1% is required, a board layout change to accommodate a different package may be needed.
The primary risk is accepting a wider resistance tolerance (±5% vs ±1%), which could affect circuit performance in sensitive applications.

UNI-ROYAL
Form-fit compatible with same power rating, but has a wider resistance tolerance of ±5%.
| Feature / factor | 181207F1001T4E | 181207J0102T4E | FRC1812J102 TS | FRC2010F1001TS | Compatibility / risk |
|---|---|---|---|---|---|
| Package | 1812 | 1812 | 1812 (4532 Metric) | 2010 (5025 metric) | 1812 / 1812 (4532 Metric) / 2010 (5025 metric) — Candidate package matches target.; FRC1812J102 TS: Candidate package matches target.; FRC2010F1001TS: Larger package, not a drop-in replacement. |
| Resistance | 1000.0 ohm | 1000.0 ohm | 1000.0 ohm | 1000.0 ohm | 1000.0 ohm — Resistance matches.; FRC1812J102 TS: Resistance matches.; FRC2010F1001TS: Resistance matches. |
| Tolerance | 1.0% | 5.0% | 5.0% | 1.0% | 5.0% / 1.0% — Tolerance is weaker, requires circuit validation.; FRC1812J102 TS: Tolerance is weaker, requires circuit validation.; FRC2010F1001TS: Tolerance matches. |
| Power | 0.75 W | 0.75 W | 0.75 W | 0.75 W | 0.75 W — Power rating matches target.; FRC1812J102 TS: Power rating matches target.; FRC2010F1001TS: Power rating matches. |
If your design can accept ±5% tolerance, FRC1812J102 TS is a strong candidate in the same 1812 package. For designs requiring ±1% tolerance, FRC2010F1001TS is electrically similar but requires a larger 2010 footprint.