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Best Alternatives to FNR4030S120MT

Package: 4030 (4.0mm x 4.0mm)Shenzhen CJiang Technology Co., Ltd.ChokesInductance: 12 µHTolerance: ±20%Saturation Current (Isat): 1.8 AHeat Rating Current (Irms): 1.4 ADC Resistance (DCR) Max: 175 mΩ

FNR4030S120MT is a 12uH shielded 4030 power inductor. Alternatives need inductance, current, DCR, and pad checks.

AI replacement insight

Electrical riskmedium

Inductance changes need circuit validation.

Package riskmedium

4030 matches, but pad/pinout is not proven.

Firmware risklow

Passive part; no firmware interface.

Sourcing riskmedium

Lifecycle data is incomplete on some candidates.

Can it be replaced directly?

No verified pin-compatible replacement is proven from the provided fields.

Best replacement path

Review FNR4030S100MT first; it matches size and improves current/DCR but is 10uH.

Main risk

Inductance and current margin changes can affect converter ripple, saturation, and stability.

Recommended alternatives

2
FNR4030S100MT package
FNR4030S100MT

cjiang (Changjiang Microelectronics Tech)

Needs validationmedium risk

FNR4030S100MT is a close 4030 inductor option with stronger current ratings.

View details

Alternative comparison matrix

Feature / factorFNR4030S120MTFNR4030S100MTYNR4030-150MAlt 3Compatibility / risk
Package4030 4x4x3mm4030 4x4x3mm4030 4x4x3mm4030 4x4x3mm — same size stated; YNR4030-150M: same footprint class
Pinout2 pins2 pins2 pins2 pins — pin count only; YNR4030-150M: pin count only
Application12uH10uH15uH10uH / 15uH — nominal -17%; YNR4030-150M: nominal +25%
Current1.8A Isat, 1.4A Irms2.4A Isat, 1.6A Irms1.65A Isat, 1.11A Irms2.4A Isat, 1.6A Irms / 1.65A Isat, 1.11A Irms — higher ratings; YNR4030-150M: less margin
Resistance175mΩ max150mΩ max247mΩ max150mΩ max / 247mΩ max — lower DCR; YNR4030-150M: more loss

Application & sourcing insights

Questions & answers

FNR4030S100MT is the closest kept candidate, but it is 10uH rather than 12uH.