0805W8F4021T5E
UNI-ROYAL
Needs validationmedium risk
A cross-vendor parametric alternative with 4.02kΩ resistance from UNI-ROYAL.
Best Alternatives to FRC0805F4221TS
Find and evaluate alternatives for the FRC0805F4221TS, a 4.22kΩ 1% 0.125W 0805 thick film resistor. This page provides parametric alternatives, upgrade paths, and engineering analysis to guide your selection.
AI replacement insight
Electrical riskmedium
Resistance deviation in all candidates requires circuit analysis. Technology change in the upgrade path (thin film) affects pulse handling.
Package risklow
All candidates share the same 0805 package, ensuring physical compatibility.
Can it be replaced directly?
No exact drop-in replacement was found; all candidates have different resistance values or characteristics requiring engineering review.
Best replacement path
For precision, RT0805BRD074K3L is an upgrade. For a closer match, FRC0805F4301TS has only a +1.9% resistance difference.
Main risk
The primary risk is the change in resistance value, which can affect circuit performance in timing, biasing, or feedback applications.
Recommended alternatives
4Alternative comparison matrix
| Feature / factor | FRC0805F4221TS | 0805W8F4021T5E | FRC0805F4121TS | FRC0805F4301TS | Compatibility / risk |
|---|---|---|---|---|---|
| Resistance | 4.22 kΩ | 4.02 kΩ | 4.12 kΩ | 4.3 kΩ | 4.02 kΩ / 4.12 kΩ / 4.3 kΩ — 4.7% lower. Tolerance bands do not overlap.; FRC0805F4121TS: 2.4% lower. Tolerance bands do not overlap.; FRC0805F4301TS: 1.9% higher than target. Tolerance bands have minimal overlap.; RT0805BRD074K3L: 1.9% higher resistance. |
| Tolerance | ±1% | ±1% | ±1% | ±1% | ±1% / ±0.1% — matched; FRC0805F4121TS: matched; FRC0805F4301TS: matched; RT0805BRD074K3L: 10x tighter tolerance. |
| Power | 0.125 W | 0.125 W | 0.125 W | 0.125 W | 0.125 W — Equal to target. Offers no additional design margin.; FRC0805F4121TS: Equal to target. Offers no additional design margin.; FRC0805F4301TS: Equal to target. Offers no additional design margin.; RT0805BRD074K3L: Power rating from ES data; artifact data was inconsistent. Assumed equal to target. |
| Tcr | ±100 ppm/°C | Missing | - | ±100 ppm/°C | Missing / ±100 ppm/°C / 25 ppm/°C — TCR not in primary specs, but likely ±100 or ±200 ppm/°C.; FRC0805F4301TS: matched; RT0805BRD074K3L: Superior temperature stability. |
| Package | 0805 | - | - | 0805 | 0805 — matched |
| Technology | Thick Film | - | - | - | Thin Film — Different technology may affect noise and pulse handling. |
Application & sourcing insights
Questions & answers
The best alternative depends on your application's needs. For higher precision, RT0805BRD074K3L is an upgrade. For a near-value match, FRC0805F4301TS has a 4.3kΩ resistance, which is very close to the 4.22kΩ target.