Is there a pin-compatible replacement for FNR3015S150MT?

Several candidates like FNR3015S120MT and YNR3015-150M share the same 3015 package and pinout, making them physically compatible. However, their electrical differences in inductance or current mean they are not direct drop-in replacements and require engineering review.

What risks should I check before replacing FNR3015S150MT?

Key risks include: 1) Inductance mismatch, which can alter switching frequency, ripple current, and loop stability. 2) Lower current ratings (Irms/Isat), which can cause overheating or performance loss under load. 3) Minor package height differences.

FNR3015S150MT Alternatives, Datasheet & Cross Reference | Shenzhen CJiang Technology Co., Ltd.

Finding a substitute for the FNR3015S150MT 15µH power inductor involves balancing inductance, current ratings, and package size. Alternatives exist but may require circuit validation.

AI replacement insight

Electrical riskmedium

Inductance mismatch in top candidates requires circuit validation.

Package risklow

Most candidates share the same 3015 package footprint.

Can it be replaced directly?

No direct drop-in replacement was found. YNR3015-150M matches inductance but has lower current ratings. FNR3015S120MT has better current but lower inductance. Both require review.

Best replacement path

The closest option is FNR3015S120MT from the same series, offering higher current ratings but with a lower 12µH inductance that requires validation.

Main risk

The main risk is either inductance mismatch, which affects converter stability and ripple, or insufficient current rating, which can lead to overheating or saturation.

Recommended alternatives

Same series alternate with higher current ratings but lower inductance (12µH vs 15µH).

View details

Alternative comparison matrix

Feature / factor	FNR3015S150MT	FNR3015S120MT	YNR3015-150M	YHNR3015-100M	Compatibility / risk
Inductance	15 µH	12 µH	15 µH	10 µH	12 µH / 15 µH / 10 µH — 20% lower, may affect ripple/stability.; YNR3015-150M: Inductance value matches target.; YHNR3015-100M: 33% lower, requires circuit redesign/validation.
Saturation Current	0.88 A	0.9 A	0.66 A	1.6 A	0.9 A / 0.66 A / 1.6 A — Slightly higher saturation current.; YNR3015-150M: Lower Isat rating, risk of saturation.; YHNR3015-100M: Significantly higher saturation current.
Rms Current	0.72 A	0.89 A	0.65 A	1.1 A	0.89 A / 0.65 A / 1.1 A — Higher heat rating current provides more margin.; YNR3015-150M: Lower Irms rating, risk of overheating.; YHNR3015-100M: Significantly higher heat rating current.
Dcr	455 mΩ	416 mΩ	455 mΩ	450 mΩ	416 mΩ / 455 mΩ / 450 mΩ — Lower DCR improves efficiency.; YNR3015-150M: DC resistance matches target.; YHNR3015-100M: Slightly lower DCR.
Package	3015 (3x3x1.5mm)	3015 (3x3x1.5mm)	3015 (3x3mm)	3015 (3x3x1.55mm)	3015 (3x3x1.5mm) / 3015 (3x3mm) / 3015 (3x3x1.55mm) — Same package family and dimensions.; YNR3015-150M: Package size matches.; YHNR3015-100M: Slightly taller package (1.55mm vs 1.5mm).

Application & sourcing insights

Questions & answers

FNR3015S120MT is a strong candidate from the same series with better current ratings, but its 12µH inductance requires circuit validation. For applications with lower current needs, YNR3015-150M matches the 15µH inductance but has lower current limits.