0603WAF6651T5E
UNI-ROYAL
Needs validationlow risk
A pin-compatible Thick Film resistor with identical resistance, tolerance, power, and package.
Best Alternatives to RS-03K6651FT
RS-03K6651FT is a common 6.65kΩ, 1% tolerance, 0.1W resistor in an 0603 package. This page provides a detailed analysis of several potential replacements, including a direct pin-compatible option and other functional alternatives from various manufacturers.
AI replacement insight
Electrical risklow
For most alternatives, resistance is the only differing parameter. The deviation is typically under 10% but must be verified for the application.
Package risklow
All reviewed candidates use the same 0603 surface-mount package, ensuring physical compatibility.
Can it be replaced directly?
Yes, 0603WAF6651T5E from UNI-ROYAL is a direct, pin-compatible replacement for RS-03K6651FT, matching all key electrical and physical parameters.
Best replacement path
The UNI-ROYAL 0603WAF6651T5E is a direct pin-for-pin replacement with identical specifications. For a major brand alternative, the Yageo RC0603FR-076K81L is a strong choice with a minor 2.4% resistance difference.
Main risk
The primary risk when considering alternatives is a deviation in resistance value. Some candidates also use different resistor technology (Thin Film vs. Thick Film), which could affect performance in sensitive applications.
Recommended alternatives
6Alternative comparison matrix
| Feature / factor | RS-03K6651FT | 0603WAF6651T5E | RC0603FR-076K81L | ARG03FTC6491 | Compatibility / risk |
|---|---|---|---|---|---|
| Resistance | 6.65 kΩ | 6.65 kΩ | 6.81 kΩ | 6.49 kΩ | 6.65 kΩ / 6.81 kΩ / 6.49 kΩ / 6.2 kΩ — Identical resistance value.; RC0603FR-076K81L: Resistance is very close (+2.4%).; ARG03FTC6491: Resistance is very close (-2.4%).; RS-03K6201FT: Resistance is 6.7% lower. |
| Tolerance | ±1% | ±1% | - | - | ±1% — Identical tolerance.; RS-03K6201FT: Identical tolerance. |
| Power | 0.1 W | 0.1 W | - | - | 0.1 W — Identical power rating.; RS-03K6201FT: Identical power rating. |
| Package | 0603 | 0603 | 0603 | 0603 | 0603 — Identical package size.; RC0603FR-076K81L: Identical package size.; ARG03FTC6491: Identical package size.; RS-03K6201FT: Identical package size. |
| Tcr | ±100ppm/℃ | ±100 ppm/°C | ±100 ppm/°C | ±25ppm/°C | ±100 ppm/°C / ±25ppm/°C — Identical temperature coefficient.; RC0603FR-076K81L: Identical TCR.; ARG03FTC6491: TCR is significantly better. |
| Technology | Thick Film | - | Thick Film | Thin Film | Thick Film / Thin Film — Identical technology.; ARG03FTC6491: Different resistor technology. |
Application & sourcing insights
Questions & answers
The best alternative is 0603WAF6651T5E from UNI-ROYAL, which is a pin-for-pin match. Other strong candidates with very similar parameters include RC0603FR-076K81L from Yageo and ARG03FTC6491 from Viking Tech.