0805W8F5101T5E
UNI-ROYAL
Needs validationmedium risk
UNI-ROYAL 5.1k 0805 is a same-series relaxed-value candidate for 0805W8F4991T5E.
Best Alternatives to 0805W8F4991T5E
0805W8F4991T5E is a 4.99k, ±1%, 0805 thick-film resistor. Kept alternatives are relaxed-value candidates, not verified drop-ins.
AI replacement insight
Electrical riskmedium
values range from 4.7k to 5.1k
Package risklow
kept parts are 0805, 2-terminal
Firmware risklow
passive resistor; no protocol impact
Sourcing riskmedium
all are active but not PDF-verified
Can it be replaced directly?
Direct replacement for 0805W8F4991T5E should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
Best replacement path
Use the same-series 0805W8F5101T5E only if 5.1k is acceptable; otherwise source an exact 4.99k part.
Main risk
Nominal resistance shift plus equal 1/8W power rating without extra derating margin.
Recommended alternatives
6Alternative comparison matrix
| Feature / factor | 0805W8F4991T5E | 0805W8F5101T5E | FRC0805F5101TS | RC0805FR-075K1L | Compatibility / risk |
|---|---|---|---|---|---|
| Package | 0805 | 0805 | - | - | 0805 metric — same EIA size |
| Pinout | 2-pin chip | 2-pin chip | - | - | 2-pin chip — passive terminals |
| Resistance | 4.99k | 5.1k | - | - | 5.1k — +2.2% nominal |
| Tolerance | ±1% | ±1% | - | - | ±1% — same class |
| Power | 0.125W | 0.125W | - | - | 0.125W — no 1.5x margin |
| Application | Thick Film | - | - | - | — |
Application & sourcing insights
Questions & answers
Verified drop-in options for 0805W8F4991T5E 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.