Is there a pin-compatible replacement for MWSA1004S-3R3MT?

Yes, SMMS1040-3R3M from SXN has been verified to have an identical land pattern based on datasheet review, making it a strong candidate for a drop-in replacement.

What risks should I check before replacing MWSA1004S-3R3MT?

The primary risk is package incompatibility; always verify the candidate's footprint against your PCB layout. Also, check for differences in secondary parameters like self-resonant frequency (SRF) and thermal performance in your specific application.

MWSA1004S-3R3MT Alternatives, Datasheet & Cross Reference | Shenzhen Sunlord Electronics Co., Ltd.

Find suitable replacements for the Sunlord MWSA1004S-3R3MT, a 3.3µH molded power inductor. This guide reviews pin-compatible upgrades, form-fit alternatives, and functional replacements for your power supply design.

AI replacement insight

Package riskhigh

Many alternatives have different footprints; layout verification is critical.

Electrical risklow

Most alternatives offer superior current and DCR ratings.

Can it be replaced directly?

Yes, SMMS1040-3R3M is a direct pin-compatible replacement with improved electrical performance.

Best replacement path

Use SMMS1040-3R3M for a direct, pin-compatible upgrade.

Main risk

Assuming any part with similar specs is a drop-in replacement without verifying the package dimensions and land pattern.

Recommended alternatives

Pin-compatible upgrade with higher current rating and lower resistance for better efficiency.

View details

Alternative comparison matrix

Feature / factor	MWSA1004S-3R3MT	SMMS1040-3R3M	PSPMAA1040H-3R3M-ANP	CYA1265-3.3UH	Compatibility / risk
Inductance	3.3µH	3.3µH	3.3µH	3.3µH	3.3µH — Inductance matches.; PSPMAA1040H-3R3M-ANP: Inductance matches.; CYA1265-3.3UH: Inductance matches.
Current	7.96A	10A	10A	25A	10A / 25A — Higher Irms offers more thermal margin.; PSPMAA1040H-3R3M-ANP: Higher Irms offers more thermal margin.; CYA1265-3.3UH: Significantly higher current rating.
Dcr	16mΩ	12mΩ	12mΩ	-	12mΩ — Lower DCR improves efficiency.; PSPMAA1040H-3R3M-ANP: Lower DCR improves efficiency.
Package	1004 (10x11.5mm)	1040 (11.5x10mm)	1040H (10.2x11.0mm)	1265 (12.8x12.5mm)	1040 (11.5x10mm) / 1040H (10.2x11.0mm) / 1265 (12.8x12.5mm) — Datasheet confirms identical land pattern.; PSPMAA1040H-3R3M-ANP: Dimensions are very close but not identical.; CYA1265-3.3UH: Larger package requires board redesign.

Application & sourcing insights

Questions & answers

The SXN SMMS1040-3R3M is an excellent alternative, offering a pin-compatible footprint with higher current rating (10A vs 7.96A) and lower DCR (12mΩ vs 16mΩ) for improved efficiency.