Is there a pin-compatible replacement for MWSA0412S-1R0MT?

Currently, no pin-for-pin compatible replacement has been verified. All reviewed candidates have different package dimensions, requiring careful mechanical and layout review.

What risks should I check before replacing MWSA0412S-1R0MT?

Key risks are package mismatch (footprint and height), and changes in electrical performance. Verify the new part's dimensions fit your layout and ensure its current ratings (Irms and Isat) and DCR meet or exceed your design's requirements.

MWSA0412S-1R0MT Alternatives, Datasheet & Cross Reference | Shenzhen Sunlord Electronics Co., Ltd.

Finding a replacement for the Sunlord MWSA0412S-1R0MT 1.0µH power inductor involves balancing electrical upgrades with physical package constraints. While several alternatives offer superior current handling, none are a direct drop-in replacement, requiring a board redesign.

AI replacement insight

Package riskhigh

No drop-in package found; all alternatives require layout changes and height clearance checks.

Electrical risklow

Several candidates offer superior current handling and lower DCR, providing an upgrade path.

Can it be replaced directly?

No direct pin-compatible replacement for MWSA0412S-1R0MT has been identified. All suitable alternatives require package footprint and/or height verification and likely a board layout change.

Best replacement path

If a board redesign is feasible, MWSA0518S-1R0MT from the same Sunlord family offers a significant upgrade in current ratings and efficiency. No direct drop-in replacement has been identified.

Main risk

The primary risk is physical incompatibility. The target's 4.4x4.2x1.0mm package is specific, and most alternatives are in different, often larger or taller, packages.

Recommended alternatives

An electrical upgrade from the same series with higher current ratings, but requires a new PCB layout due to a different package.

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Alternative comparison matrix

Feature / factor	MWSA0412S-1R0MT	MWSA0518S-1R0MT	WPN4020H1R0MT	Compatibility / risk
Current	7.0 A	9.0 A	8.7 A	9.0 A / 8.7 A — Saturation Current (Isat); WPN4020H1R0MT: Saturation Current (Isat)
Dcr Ohm	27 mΩ	17 mΩ	26 mΩ	17 mΩ / 26 mΩ — Lower DCR improves efficiency.; WPN4020H1R0MT: Slightly better efficiency.
Package	0412	0518	4.0x4.0x2.0mm	0518 / 4.0x4.0x2.0mm — Different footprint, requires layout change.; WPN4020H1R0MT: Different footprint and 2x taller.

Application & sourcing insights

Questions & answers

The best functional alternative is MWSA0518S-1R0MT, offering higher current ratings and lower resistance. However, it is not pin-compatible and requires a new PCB layout.