ARG05BTC4991
Viking Tech
Needs validationmedium risk
Upgrade path with better tolerance (±0.1%) and TCR (±25ppm/°C), but technology changes to Thin Film.
Best Alternatives to RS-05K4991FT
Find verified substitutes for the RS-05K4991FT, a 4.99kΩ 1% 125mW 0805 thick film resistor. This page analyzes pin-compatible and parametric alternatives, highlighting key differences for your design.
AI replacement insight
Electrical riskmedium
Some candidates have different technology (Thin Film) or resistance values, requiring circuit validation.
Package risklow
All viable candidates use the standard 0805 package, ensuring physical compatibility.
Sourcing risklow
This is a common resistor value available from multiple vendors, ensuring a stable supply chain.
Can it be replaced directly?
Direct replacement for RS-05K4991FT should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
Best replacement path
The most direct path is FRC0805F4991TS, which matches all key parameters. For higher precision, consider thin film upgrades like ARG05BTC4991, but validate the technology change.
Main risk
The main risk when substituting is an unintentional change in resistor technology from Thick Film to Thin Film, which can impact circuit performance in sensitive applications.
Recommended alternatives
3Alternative comparison matrix
| Feature / factor | RS-05K4991FT | ARG05BTC4991 | FRC0805F4991TS | RK73H2ATTD4701F | Compatibility / risk |
|---|---|---|---|---|---|
| Package | 0805 | 0805 | 0805 | 0805 (2012 Metric) | 0805 / 0805 (2012 Metric) — Form factor matches.; FRC0805F4991TS: Form factor matches.; RK73H2ATTD4701F: Form factor matches. |
| Technology | Thick Film | Thin Film | - | - | Thin Film — Technology differs; may affect noise and pulse handling. Review required. |
| Tolerance | ±1.0% | ±0.1% | ±1.0% | ±1.0% | ±0.1% / ±1.0% — Candidate has tighter tolerance.; FRC0805F4991TS: Tolerance matches.; RK73H2ATTD4701F: Tolerance matches. |
| Tcr | ±100ppm/℃ | ±25ppm/°C | ±100 ppm/°C | - | ±25ppm/°C / ±100 ppm/°C — Candidate has better temperature stability.; FRC0805F4991TS: TCR matches. |
| Power | 0.125W | 0.125W | 0.125W | 0.25W | 0.125W / 0.25W — Power rating matches.; FRC0805F4991TS: Power rating matches.; RK73H2ATTD4701F: Higher power rating provides more margin. |
| Resistance | 4.99kΩ | - | 4.99kΩ | 4.7kΩ | 4.99kΩ / 4.7kΩ — Resistance matches.; RK73H2ATTD4701F: Resistance differs by -5.8%. Application must tolerate this deviation. |
Application & sourcing insights
Questions & answers
Verified drop-in options for RS-05K4991FT 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.