Is there a pin-compatible replacement for FNR5020S3R3MT?

Yes, several parts share the 5.0x5.0mm 2-pin package, including others in the FNR5020S family. However, their electrical properties, especially inductance, differ, so they are functional alternatives, not direct drop-in replacements.

What risks should I check before replacing FNR5020S3R3MT?

The main risk is the change in inductance, which will alter the performance of a power converter (e.g., ripple current, stability). Also, ensure the substitute's current ratings (Isat/Irms) are equal to or greater than the original's.

FNR5020S3R3MT Alternatives, Datasheet & Cross Reference | Shenzhen CJiang Technology Co., Ltd.

FNR5020S3R3MT is a 3.3µH shielded power inductor from cjiang in a 5.0x5.0mm package. Finding a substitute requires matching inductance, current ratings, and DCR for your specific application.

AI replacement insight

Electrical riskhigh

Inductance directly impacts power converter performance and stability.

Package risklow

Alternatives from the same series share the same package and pinout.

Can it be replaced directly?

No direct, one-to-one replacement has been identified. All candidates require engineering review due to different inductance values.

Best replacement path

Use another inductor from the cjiang FNR5020S series with a different inductance value, but verify circuit performance through simulation or testing.

Main risk

Circuit malfunction due to mismatched inductance, which can affect efficiency, ripple, and stability in power supplies.

Recommended alternatives

A functional alternative from the same series with higher current ratings but lower inductance.

View details

Alternative comparison matrix

Feature / factor	FNR5020S3R3MT	FNR5020S2R2MT	FNR5020S1R5MT	Compatibility / risk
Inductance	3.3 µH	2.2 µH	1.5 µH	2.2 µH / 1.5 µH — Lower inductance requires circuit re-evaluation.; FNR5020S1R5MT: Significantly lower inductance requires circuit re-evaluation.
Current	2.7 A (Irms)	3.1 A	3.5 A	3.1 A / 3.5 A — Higher RMS current rating.; FNR5020S1R5MT: Higher RMS current rating.
Resistance	56 mΩ (DCR)	42 mΩ	34 mΩ	42 mΩ / 34 mΩ — Lower DCR improves efficiency.; FNR5020S1R5MT: Lower DCR improves efficiency.
Package	5020 (5.0mm x 5.0mm)	5.0mm x 5.0mm	5.0mm x 5.0mm	5.0mm x 5.0mm — Same package footprint.; FNR5020S1R5MT: Same package footprint.

Application & sourcing insights

Questions & answers

No direct drop-in replacement was found. However, other parts from the same FNR5020S series, like FNR5020S2R2MT (2.2µH), are functional alternatives with different inductance values that require engineering review.