
FOJAN
A strong parametric match in the same package, but lacks the target's AEC-Q200 qualification.
Finding a substitute for the Yageo AC0603FR-078K2L involves matching its 8.2kΩ resistance, 1% tolerance, and 0603 package. The key challenge is its AEC-Q200 qualification for automotive use.
Substituting a non-AEC-Q200 part into an automotive design can violate reliability and safety standards.
Candidates with matching 0603 packages present minimal physical integration risk.
Direct replacement for AC0603FR-078K2L should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
For non-automotive applications, FRC0603F8251TS is a strong candidate. For automotive use, a direct replacement must also be AEC-Q200 qualified, which was not found in this list.
The primary risk is using a non-AEC-Q200 qualified part in an automotive or high-reliability application where the original was specified.

FOJAN
A strong parametric match in the same package, but lacks the target's AEC-Q200 qualification.
| Feature / factor | AC0603FR-078K2L | FRC0603F8251TS | RT0603BRD078K2L | Alt 3 | Compatibility / risk |
|---|---|---|---|---|---|
| Package | 0603 | 0603 | 0603 | 0603 — Identical package and pin count.; RT0603BRD078K2L: Identical package and pin count. | |
| Resistance | 8.2 kΩ | 8.25 kΩ | - | 8.25 kΩ — 0.6% deviation, well within target's 1% tolerance. | |
| Tolerance | ±1% | ±1% | ±0.1% | ±1% / ±0.1% — matched; RT0603BRD078K2L: Tighter tolerance is an upgrade. | |
| Technology | Thick Film | Thick Film | Thin Film | Thick Film / Thin Film — matched; RT0603BRD078K2L: Different resistor technology may affect noise and pulse handling. | |
| Qualification | AEC-Q200 | Not Specified | Not Specified | Not Specified — Target is AEC-Q200 qualified for automotive use; candidate is not.; RT0603BRD078K2L: Target is AEC-Q200 qualified; candidate is not. | |
| Tcr | ±100 ppm/°C | - | 25 ppm/°C | 25 ppm/°C — Better temperature stability. |
Verified drop-in options for AC0603FR-078K2L 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.