0603WAJ051JT5E
UNI-ROYAL
Needs validationhigh risk
Matches key specs like resistance and power, but TCR is unknown and must be verified from the datasheet.
Best Alternatives to RS-03L5R1JT
Finding a replacement for the RS-03L5R1JT 5.1Ω 0603 resistor involves matching resistance, power, and package. Several pin-compatible alternatives exist but may require review of secondary parameters like TCR.
AI replacement insight
Electrical riskmedium
TCR and minor resistance variations in alternatives require circuit-level review.
Package risklow
All suggested alternatives use the same standard 0603 package.
Can it be replaced directly?
Direct replacement for RS-03L5R1JT should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
Best replacement path
Start with Datasheet verified or Strong match candidates for RS-03L5R1JT, then review parametric alternatives for package and electrical fit.
Main risk
The main risk is substituting a resistor with a worse Temperature Coefficient (TCR), which can cause resistance drift in circuits sensitive to temperature changes.
Recommended alternatives
3Alternative comparison matrix
| Feature / factor | RS-03L5R1JT | 0603WAJ051JT5E | FRC0603J5R1 TS | RC0603FR-074R99L | Compatibility / risk |
|---|---|---|---|---|---|
| Package | 0603 | 0603 | 0603 | 0603 | 0603 — Form and fit match.; FRC0603J5R1 TS: Form and fit match.; RC0603FR-074R99L: Form and fit match. |
| Resistance | 5.1 Ω | 5.1 Ω | 5.1 Ω | 4.99 Ω | 5.1 Ω / 4.99 Ω — Resistance value is identical.; FRC0603J5R1 TS: Resistance value is identical.; RC0603FR-074R99L: Resistance is very close (-2.1%). |
| Power | 0.1 W | 0.1 W | 0.1 W | - | 0.1 W — Power rating is identical.; FRC0603J5R1 TS: Power rating is identical. |
| Tcr | ±250ppm/℃ | Not specified | ±400 ppm/°C | ±200 ppm/°C | Not specified / ±400 ppm/°C / ±200 ppm/°C — TCR data is missing, must verify from datasheet.; FRC0603J5R1 TS: Candidate has a higher (worse) TCR.; RC0603FR-074R99L: Lower (better) TCR. |
| Tolerance | ±5% | - | ±5% | ±1% | ±5% / ±1% — Tolerance is identical.; RC0603FR-074R99L: Tighter (better) tolerance. |
Application & sourcing insights
Questions & answers
Verified drop-in options for RS-03L5R1JT 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.