Is there a pin-compatible replacement for SMMS0420-150M?

Based on this analysis, no pin-compatible replacements were identified. All candidates are in different, larger packages. To find a pin-compatible part, you must search for 15µH inductors specifically in a 0420 (4x4mm) package.

What risks should I check before replacing SMMS0420-150M?

The main risk is the package mismatch; you must redesign your PCB layout. Also, verify that the different electrical characteristics (like lower DCR and higher saturation current) do not negatively impact your circuit's behavior, such as the stability of a switching regulator.

SMMS0420-150M Alternatives, Datasheet & Cross Reference | SXN

SMMS0420-150M is a compact 15µH, 1.9A molding power inductor. While direct drop-in replacements may exist, many functional alternatives offer superior current handling and efficiency in larger packages, requiring a PCB layout change for an upgrade.

AI replacement insight

Package riskhigh

All candidates have different, larger footprints requiring a board redesign.

Electrical risklow

Candidates offer improved current ratings and lower DCR, which is generally beneficial.

Can it be replaced directly?

No direct pin-for-pin replacements were found in this analysis. All reviewed candidates require a PCB layout change due to different package sizes.

Best replacement path

For higher performance, consider SRYH.0630C.YF150MT00 or SWPA8040S150MT, but you must redesign the PCB layout to accommodate the larger package.

Main risk

The primary risk is mechanical incompatibility. All functional alternatives are in larger packages and are not drop-in replacements.

Recommended alternatives

A functional alternative from the same manufacturer with better performance in a larger package.

View details

Alternative comparison matrix

Feature / factor	SMMS0420-150M	SMNR6045-150MT	SRYH.0630C.YF150MT00	SWPA8040S150MT	Compatibility / risk
Inductance	15 µH	15 µH	15 µH	15 µH	15 µH — Inductance value matches.; SRYH.0630C.YF150MT00: Inductance value matches.; SWPA8040S150MT: Inductance value matches.
Saturation Current A	1.9 A	2.5 A	4.0 A	3.4 A	2.5 A / 4.0 A / 3.4 A — Higher saturation current.; SRYH.0630C.YF150MT00: Significantly higher saturation current.; SWPA8040S150MT: Higher saturation current provides more margin.
Current A	1.4 A	2.05 A	3.0 A	2.6 A	2.05 A / 3.0 A / 2.6 A — Higher RMS current rating.; SRYH.0630C.YF150MT00: Higher RMS current rating.; SWPA8040S150MT: Higher RMS current rating.
Dcr Ohm	320 mΩ	68 mΩ	113 mΩ	47 mΩ	68 mΩ / 113 mΩ / 47 mΩ — Lower DCR improves efficiency.; SRYH.0630C.YF150MT00: Lower DCR improves efficiency.; SWPA8040S150MT: Lower DCR improves efficiency.
Package	0420 (4x4x2mm)	6045 (6x6x4.5mm)	0630C (7x6.6x2.8mm)	8040 (8x8x4.2mm)	6045 (6x6x4.5mm) / 0630C (7x6.6x2.8mm) / 8040 (8x8x4.2mm) — Physically larger, requires PCB redesign.; SRYH.0630C.YF150MT00: Physically larger, requires PCB redesign.; SWPA8040S150MT: Physically much larger, requires PCB redesign.

Application & sourcing insights

Questions & answers

The best alternative depends on your priorities. For a significant performance upgrade, SRYH.0630C.YF150MT00 offers much higher current ratings. However, like all suggested alternatives, it is in a larger package and requires a PCB redesign.