Is there a pin-compatible replacement for SMNR4030-100MT?

No direct pin-compatible replacement has been identified. The closest alternatives, like SMNR5040-100MT, have slightly different package dimensions, which necessitates a review of the PCB land pattern.

What risks should I check before replacing SMNR4030-100MT?

The primary risk is physical incompatibility. Most alternatives have different package sizes. Always verify the candidate's footprint and height against your board layout. Also check that the higher current ratings do not negatively impact circuit behavior.

SMNR4030-100MT Alternatives, Datasheet & Cross Reference | SXN

SMNR4030-100MT is a 10µH, 1.95A shielded power inductor in a compact 4030 package. When seeking alternatives, key considerations are current ratings (Isat/Irms), DC resistance (DCR), and physical package size.

AI replacement insight

Electrical risklow

Most candidates offer superior current and DCR ratings.

Package riskhigh

Most candidates are physically larger and require a board redesign.

Can it be replaced directly?

No direct drop-in replacement has been verified. All suitable electrical alternatives require a package and land pattern review.

Best replacement path

Upgrade to SMNR5040-100MT for better electrical performance, provided the slightly larger 5.0x5.0mm package fits your layout.

Main risk

Package Mismatch

Recommended alternatives

An electrical upgrade from the same series with higher current and lower DCR, but in a slightly larger package.

View details

Alternative comparison matrix

Feature / factor	SMNR4030-100MT	SMNR5040-100MT	TMPA1265SP-100MN-D	Compatibility / risk
Package	4030	5040	12.6mm x 13.5mm	5040 / 12.6mm x 13.5mm — Slightly larger package, requires layout check.; TMPA1265SP-100MN-D: Significantly larger, requires board redesign.
Saturation Current A	1.95A	2.35A	17.0A	2.35A / 17.0A — Higher saturation current provides more margin.; TMPA1265SP-100MN-D: Vastly superior saturation current.
Current A	1.50A	2.10A	13.0A	2.10A / 13.0A — Higher thermal current rating.; TMPA1265SP-100MN-D: Significantly higher thermal current rating.
Dcr Ohm	100mΩ	64mΩ	13mΩ	64mΩ / 13mΩ — Lower DCR improves efficiency.; TMPA1265SP-100MN-D: Much lower DCR improves efficiency.
Temperature	-40°C to +125°C	-40°C to +125°C	-	-40°C to +125°C — Operating range matches.

Application & sourcing insights

Questions & answers

The SMNR5040-100MT from the same manufacturer offers higher current ratings and lower DCR. However, it comes in a slightly larger 5040 package, requiring verification of your PCB layout.