Is there a pin-compatible replacement for SMMS1040-101MT?

No drop-in, pin-compatible replacement is confirmed. The closest option, PSPMAC1045H-101M-ANP, has a similar 1045 package, but its land pattern must be verified against your PCB layout.

What risks should I check before replacing SMMS1040-101MT?

Key risks include: 1) Package mismatch requiring PCB redesign. 2) Reduced operating temperature range. 3) Differences in saturation current (Isat) and DC resistance (DCR) affecting circuit efficiency and stability.

SMMS1040-101MT Alternatives, Datasheet & Cross Reference | SXN

Finding a replacement for the SMMS1040-101MT 100µH power inductor involves matching its current ratings and 1040 package. Several functional alternatives exist with similar or better electrical performance.

AI replacement insight

Package riskmedium

Alternatives have different or slightly different footprints, requiring layout verification or redesign.

Electrical risklow

Most candidates meet or exceed electrical ratings, but temperature range may differ.

Can it be replaced directly?

No confirmed direct pin-to-pin replacement has been identified. PSPMAC1045H-101M-ANP is the closest candidate but requires engineering verification.

Best replacement path

PSPMAC1045H-101M-ANP offers a strong electrical match in a similar package, but requires checking the operating temperature and PCB footprint.

Main risk

The primary risks are mechanical incompatibility due to package differences and potential de-rating from a narrower operating temperature range.

Recommended alternatives

Strong electrical match in a similar package, but requires verification of temperature range and PCB footprint.

View details

Alternative comparison matrix

Feature / factor	SMMS1040-101MT	PSPMAC1045H-101M-ANP	CYA1265-100UH	Compatibility / risk
Saturation Current A	3.0A	4.0A	8.5A	4.0A / 8.5A — Candidate has higher saturation current.; CYA1265-100UH: Significantly higher saturation current.
Current A	2.0A	2.0A	4.5A	2.0A / 4.5A — Rated current matches target.; CYA1265-100UH: Higher rated current.
Dcr Ohm	310mΩ	250mΩ	185mΩ	250mΩ / 185mΩ — Lower DCR improves efficiency.; CYA1265-100UH: Lower DCR improves efficiency.
Package	1040 (11.5x10.0mm)	1045 (10.2x10.6mm)	1265	1045 (10.2x10.6mm) / 1265 — Similar size, but land pattern must be verified.; CYA1265-100UH: Different package requires board redesign.
Temperature	-55°C to +125°C	-25°C to +125°C	-	-25°C to +125°C — Narrower operating range on low end.

Application & sourcing insights

Questions & answers

PSPMAC1045H-101M-ANP is a strong candidate, offering higher current and lower resistance in a similar package. However, its lower operating temperature limit of -25°C must be acceptable for your application.