Is there a pin-compatible replacement for SMMS0420-2R2M?

Currently, no pin-to-pin compatible replacement has been verified. All identified alternatives have different package sizes and would require a PCB layout change.

What risks should I check before replacing SMMS0420-2R2M?

The primary risk is the physical package mismatch; verify board space and land pattern. Also check that the alternative's electrical parameters, like saturation current and DCR, are suitable for your application's stability and efficiency.

SMMS0420-2R2M Alternatives, Datasheet & Cross Reference | SXN

Finding a replacement for the SMMS0420-2R2M 2.2µH inductor requires balancing electrical performance with physical package size. While no direct drop-in replacements are available, several functional alternatives offer superior current handling in different footprints.

AI replacement insight

Package riskhigh

All candidates have different, mostly larger, footprints than the target's 0420 package.

Electrical risklow

Most candidates offer superior current handling and lower DCR. One has a weaker Irms.

Can it be replaced directly?

No, a direct drop-in replacement is not available due to package differences.

Best replacement path

Upgrade to a larger package like SMMS0530-2R2M for better electrical performance if board redesign is possible.

Main risk

Physical incompatibility; all reviewed alternatives require PCB layout changes.

Recommended alternatives

An electrical upgrade with higher current ratings and lower DCR, but in a larger 0530 package requiring a new layout.

View details

Alternative comparison matrix

Feature / factor	SMMS0420-2R2M	SMMS0530-2R2M	SMMS0630-2R2M	SWPA5040S2R2NT	Compatibility / risk
Package	0420	0530	0630	5040	0530 / 0630 / 5040 — Larger footprint (~5x5mm vs ~4x4mm), requires layout change.; SMMS0630-2R2M: Significantly larger footprint (~6x6mm vs ~4x4mm).; SWPA5040S2R2NT: Larger footprint (5x5mm vs ~4x4mm), requires layout change.
Saturation Current A	5.0A	7.0A	11.5A	5.5A	7.0A / 11.5A / 5.5A — Higher current handling capability.; SMMS0630-2R2M: Much higher saturation current.; SWPA5040S2R2NT: Slightly higher saturation current.
Current	4.5A (Irms)	6.5A (Irms)	8.5A (Irms)	4.3A (Irms)	6.5A (Irms) / 8.5A (Irms) / 4.3A (Irms) — Higher heat rating current.; SMMS0630-2R2M: Much higher heat rating current.; SWPA5040S2R2NT: Lower heat rating current, requires thermal validation.
Dcr Ohm	0.052 (typ)	0.031 (typ)	0.0165 (typ)	0.019 (typ)	0.031 (typ) / 0.0165 (typ) / 0.019 (typ) — Lower DCR improves efficiency.; SMMS0630-2R2M: Significantly lower DCR.; SWPA5040S2R2NT: Significantly lower DCR improves efficiency.
Tolerance	±20%	-	-	±30%	±30% — Wider inductance tolerance.

Application & sourcing insights

Questions & answers

The best alternative depends on design flexibility. For new layouts, parts like SMMS0530-2R2M offer upgraded electrical specs in a slightly larger package. For existing boards, no direct drop-in has been identified.