CR-03FL7----1K
Viking Tech
Needs validationmedium risk
A close parametric match, but with a slightly lower power rating that must be verified.
Best Alternatives to RK73H1JTTD1001F
Finding a substitute for the KOA Speer RK73H1JTTD1001F 1kΩ 1% 0.125W 0603 resistor involves balancing power rating, precision, and technology. Several alternatives exist with tighter tolerance and TCR, but may have a lower power rating requiring review.
AI replacement insight
Electrical riskmedium
All candidates have a lower power rating (0.1W vs 0.125W).
Package risklow
All candidates match the 0603 package.
Sourcing risklow
Multiple manufacturers offer similar parts.
Can it be replaced directly?
No direct drop-in replacement without caveats has been identified. All reviewed candidates have a lower power rating (0.1W vs 0.125W), which requires engineering validation.
Best replacement path
For general use, CR-03FL7----1K is a close thick-film match if the slightly lower 0.1W power rating is acceptable. For precision, thin-film options like TD03E1001BT offer better specs but also require power and technology review.
Main risk
The primary risk is the lower power rating of all candidates, which could lead to overheating or failure if the circuit operates near the target's 0.125W limit.
Recommended alternatives
5Alternative comparison matrix
| Feature / factor | RK73H1JTTD1001F | CR-03FL7----1K | AR03FTDX1001A | ARG03DTC1001 | Compatibility / risk |
|---|---|---|---|---|---|
| Package | 0603 (1608 Metric) | 0603 | 0603 | 0603 | 0603 — Form factor matches.; AR03FTDX1001A: Form factor matches.; ARG03DTC1001: Form factor matches.; PTFR0603B1K00N9: Form factor matches. |
| Resistance | 1000.0 ohm | 1000.0 ohm | - | - | 1000.0 ohm — Resistance matches. |
| Power | 0.125W | 0.1W | 0.1W | 0.1W | 0.1W — Slightly lower power rating requires review.; AR03FTDX1001A: Lower power rating requires review.; ARG03DTC1001: Lower power rating requires review.; PTFR0603B1K00N9: Lower power rating requires review. |
| Tolerance | 1.0% | 1.0% | - | 0.5% | 1.0% / 0.5% / 0.1% — Tolerance matches.; ARG03DTC1001: Tighter tolerance is an upgrade.; PTFR0603B1K00N9: Tighter tolerance is an upgrade. |
| Tcr | ±100ppm/°C | ±100 ppm/℃ | ±50ppm/°C | ±25ppm/°C | ±100 ppm/℃ / ±50ppm/°C / ±25ppm/°C / ±10ppm/℃ — TCR matches.; AR03FTDX1001A: Tighter TCR is an upgrade.; ARG03DTC1001: Lower TCR provides better stability.; PTFR0603B1K00N9: Lower TCR provides better stability. |
| Technology | Thick Film | - | Thin Film | Thin Film | Thin Film — Different technology may affect noise/pulse performance.; ARG03DTC1001: Different technology may affect noise/pulse performance. |
| Application | AEC-Q200 | - | AEC-Q200 | - | AEC-Q200 — Also AEC-Q200 qualified.; PTFR0603B1K00N9: Also AEC-Q200 qualified. |
Application & sourcing insights
Questions & answers
The best alternative depends on your application. For a similar technology, Viking's CR-03FL7----1K is a close match if a 0.1W power rating is sufficient. For higher precision, thin-film parts like TD03E1001BT are excellent upgrades, provided the power and technology differences are acceptable.