What risks should I check before replacing SMS0420-100MT?

Key risks include: 1) Package Mismatch: Most alternatives have different footprints requiring a PCB redesign. 2) Electrical Differences: Check DC Resistance (DCR), as a higher value increases power loss. 3) Current Ratings: Ensure the replacement's Irms and Isat meet or exceed the original's 1.6A and 2.0A.

SMS0420-100MT Alternatives, Datasheet & Cross Reference | Shenzhen Lantu Micro Electric Technology Co., Ltd.

Finding a substitute for the SMS0420-100MT 10µH inductor involves matching its 0420 package and key electrical ratings. While several functional alternatives exist, only a few are close form-fit matches.

AI replacement insight

Package riskhigh

Most alternatives are not form-fit compatible and require a PCB redesign.

Electrical risklow

Most candidates meet or exceed key electrical specs. The main electrical risk is the slightly higher DCR of the best-fit part.

Can it be replaced directly?

Direct replacement for SMS0420-100MT should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

XR0420-100M offers the same package style and primary ratings, but its slightly higher DCR must be evaluated.

Main risk

The primary risks are package footprint mismatch for most alternatives and slightly increased power loss for the closest form-fit option.

Recommended alternatives

Potential pin-compatible match with identical ratings but slightly higher DCR. Footprint verification is required.

View details

Alternative comparison matrix

Feature / factor	SMS0420-100MT	XR0420-100M	FXLA0630-100M	XR0520-100M	Compatibility / risk
Package	0420 (4.6x4.2mm)	0420 (4.4x4.2mm)	SMD (7.3x6.8mm)	0520	0420 (4.4x4.2mm) / SMD (7.3x6.8mm) / 0520 — Very similar package name and dimensions.; FXLA0630-100M: Different package requires PCB redesign.; XR0520-100M: Different package requires PCB redesign.
Inductance	10µH	10µH	10µH	10µH	10µH — Identical inductance value.; FXLA0630-100M: Identical inductance value.; XR0520-100M: Identical inductance value.
Current	1.6A	1.6A	4.5A	2.5A	1.6A / 4.5A / 2.5A — Irms current rating is identical.; FXLA0630-100M: Significantly higher Irms provides more thermal margin.; XR0520-100M: Higher Irms provides more thermal margin.
Saturation Current A	2.0A	2.0A	-	-	2.0A — Saturation current is identical.
Dcr Ohm	220mΩ	282mΩ	68mΩ	175mΩ	282mΩ / 68mΩ / 175mΩ — Higher DCR will cause slightly more power loss.; FXLA0630-100M: Significantly lower DCR improves efficiency.; XR0520-100M: Lower DCR improves efficiency.

Application & sourcing insights

Questions & answers

Verified drop-in options for SMS0420-100MT are limited in the current batch. Review candidates marked Strong match or Datasheet verified, and validate package, pinout, and electrical limits before committing a BOM change.