LR123WF100LT4E
UNI-ROYAL
Needs validationlow risk
A form, fit, and functional upgrade with a higher 3W power rating in the same 2512 package.
Best Alternatives to LR2512-2AR100F4
Find suitable replacements for the RALEC LR2512-2AR100F4, a 1.5W, 100mΩ, 2512 chip resistor. This guide provides verified alternatives with higher power ratings for improved reliability.
AI replacement insight
Electrical risklow
Low if power rating is ≥ 2.25W and TCR is comparable.
Package risklow
2512 is a standard package with many pin-compatible options.
Sourcing risklow
Multiple vendors produce suitable high-power 2512 resistors.
Can it be replaced directly?
Yes, direct replacements exist. Look for 2512 resistors with 0.1Ω, ±1% tolerance, and a power rating of 2.25W or more. Several candidates match these criteria.
Best replacement path
Upgrade to a resistor with a higher power rating (3W or 4W) for increased design margin, such as UNI-ROYAL's LR123WF400NT4E or Isabellenhuette's VMS-R100-1.0-U.
Main risk
The primary risk is selecting a substitute with an insufficient power rating. The engineering safety margin requires at least 2.25W.
Recommended alternatives
5Alternative comparison matrix
| Feature / factor | LR2512-2AR100F4 | LR123WF100LT4E | LR123WF400NT4E | HoLLR2512-3W-100mR-1% | Compatibility / risk |
|---|---|---|---|---|---|
| Package | 2512 | 2512 | 2512 | 2512 | 2512 — Form factor matches.; LR123WF400NT4E: Form factor matches.; HoLLR2512-3W-100mR-1%: Form factor matches.; RLP25FEGR100: Form factor matches. |
| Resistance | 0.1 Ω | 0.1 Ω | 0.1 Ω | 0.1 Ω | 0.1 Ω — Resistance value matches.; LR123WF400NT4E: Resistance value matches.; HoLLR2512-3W-100mR-1%: Resistance value matches.; RLP25FEGR100: Resistance value matches. |
| Power | 1.5W | 3.0W | 3.0W | 3.0W | 3.0W — Higher power rating provides more design margin.; LR123WF400NT4E: Higher power rating provides more design margin.; HoLLR2512-3W-100mR-1%: Higher power rating provides more design margin.; RLP25FEGR100: Higher power rating provides more design margin. |
| Tolerance | ±1% | - | ±1% | - | ±1% — Precision matches. |
| Tcr | ≤±50 ppm/°C | - | ±50 PPM/°C | - | ±50 PPM/°C — Temperature coefficient is within spec. |
| Technology | Metal Alloy | - | - | Metal Alloy | Metal Alloy / Metal Foil — Technology matches.; RLP25FEGR100: Technology differs but is likely an upgrade. |
Application & sourcing insights
Questions & answers
The best alternatives are typically 2512-package resistors with 0.1Ω resistance, ±1% tolerance, and a power rating of 2.25W or higher. Parts like UNI-ROYAL's LR123WF400NT4E or Isabellenhuette's VMS-R100-1.0-U are strong upgrade candidates.