FNR4030S121MT
Shenzhen CJiang Technology Co., Ltd.
Needs validationhigh risk
FNR4030S121MT may fit the same 4030 footprint but is a higher-inductance, lower-current option.
Best Alternatives to FNR4030S680MT
FNR4030S680MT is a 68uH shielded 4030 power inductor. No direct replacement is verified from the provided candidates.
AI replacement insight
Electrical riskhigh
Key inductor values differ.
Package riskmedium
4030 matches, pinout not proven.
Firmware risklow
Passive part; no firmware.
Sourcing riskmedium
Lifecycle data is limited.
Can it be replaced directly?
Direct replacement for FNR4030S680MT should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
Best replacement path
Use FNR4030S121MT only as a reviewed parametric option if higher inductance and lower current are acceptable.
Main risk
Inductance, current rating, and DCR differ from the target.
Recommended alternatives
1Alternative comparison matrix
| Feature / factor | FNR4030S680MT | FNR4030S121MT | Alt 2 | Alt 3 | Compatibility / risk |
|---|---|---|---|---|---|
| Package | 4030 4x4mm | 4030 4x4mm | 4030 4x4mm — same listed size | ||
| Pinout | 2 pins | 2 pins | 2 pins — pin count only | ||
| Application | 68uH inductor | 120uH inductor | 120uH inductor — requires redesign check | ||
| Current | 570mA/800mA | 460mA/600mA | 460mA/600mA — lower Irms and Isat | ||
| Resistance | 0.868/1.128Ω | 1.755Ω | 1.755Ω — higher DCR |
Application & sourcing insights
Questions & answers
Verified drop-in options for FNR4030S680MT 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.