
TAI-TECH
A strong alternative with matching package, inductance, and improved current ratings and DCR.
FNR5020S2R2MT is a 2.2µH shielded power inductor in a 5x5mm package, commonly used in DC-DC converters. Several alternatives are available, with HPC5020NF-2R2M being a strong pin-compatible candidate with improved performance.
Most candidates have different electricals. HPC5020NF-2R2M is an upgrade, posing minimal risk.
Several alternatives have different heights. HPC5020NF-2R2M appears to match, but land pattern verification is crucial.
Direct replacement for FNR5020S2R2MT should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
HPC5020NF-2R2M from TAI-TECH is the best replacement path, offering matching form-factor and improved electrical characteristics.
The primary risk is ensuring the PCB land pattern is identical, as minor variations can exist between manufacturers. Always verify the candidate's datasheet.

TAI-TECH
A strong alternative with matching package, inductance, and improved current ratings and DCR.
| Feature / factor | FNR5020S2R2MT | HPC5020NF-2R2M | YNR5040-2R2N | FNR5020S3R3MT | Compatibility / risk |
|---|---|---|---|---|---|
| Package | 5.0mm x 5.0mm x ~2.0mm | 5.0mm x 5.0mm x 2.0mm | 5.0mm x 5.0mm x 4.0mm | 5.0mm x 5.0mm x 2.0mm | 5.0mm x 5.0mm x 2.0mm / 5.0mm x 5.0mm x 4.0mm / 5.0mm x 5.0mm x 1.2mm — Package dimensions appear to match.; YNR5040-2R2N: Significantly taller (4.0mm vs ~2.0mm).; FNR5020S3R3MT: Same package family, likely form-fit compatible.; YNR5012-2R2M: Shorter height (1.2mm vs ~2.0mm). |
| Resistance | 56 mΩ typ | 32 mΩ | 25 mΩ max | 3.3 µH | 32 mΩ / 25 mΩ max / 3.3 µH / 2.2uH — Significantly lower DCR improves efficiency.; YNR5040-2R2N: Lower DCR improves efficiency.; FNR5020S3R3MT: Inductance is higher, will change circuit behavior.; YNR5012-2R2M: Inductance value matches. |
| Current | Irms: 3.1A, Isat: 4A | Irms: 3.3A, Isat: 4.1A | Irms: 3.8A, Isat: 4.9A | Irms: 2.7A, Isat: 3A | Irms: 3.3A, Isat: 4.1A / Irms: 3.8A, Isat: 4.9A / Irms: 2.7A, Isat: 3A / Irms: 1.7A, Isat: 3.1A — Slightly higher current ratings.; YNR5040-2R2N: Higher current ratings provide more margin.; FNR5020S3R3MT: Both rated and saturation currents are lower.; YNR5012-2R2M: Rated current is nearly 50% lower. |
| Tolerance | ±20% | - | ±30% | - | ±30% — Wider tolerance may affect circuit precision. |
Verified drop-in options for FNR5020S2R2MT 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.