MWSA0503S-1R0MT
Sunlord
Needs validationhigh risk
A functional alternative with better electrical specs in a larger, non-compatible package.
Best Alternatives to WPN4020H1R0MT
WPN4020H1R0MT is a 1.0µH, 5.8A power inductor in a compact 4.0x4.0mm package. While no direct drop-in replacements are identified, several functional alternatives offer superior electrical performance in larger packages, suitable for designs where board space allows for modification.
AI replacement insight
Package riskhigh
All candidates have larger footprints (e.g., 6.6x7.0mm vs 4.0x4.0mm), requiring mandatory board redesign.
Electrical risklow
All candidates offer superior current ratings and lower DCR, representing an electrical upgrade.
Sourcing riskmedium
Alternatives are available from multiple vendors, but qualification is required for each.
Can it be replaced directly?
No, there is no direct, drop-in replacement for WPN4020H1R0MT among the reviewed candidates. All alternatives have different physical package sizes.
Best replacement path
Use a functional alternative like Sunlord's MWSA0603S-1R0MT for a significant performance upgrade, but you must redesign the PCB layout for its larger 6.6x7.0mm package.
Main risk
The main risk is physical incompatibility. All potential substitutes are larger than the original part and will not fit on the existing PCB footprint.
Recommended alternatives
4Alternative comparison matrix
| Feature / factor | WPN4020H1R0MT | MWSA0503S-1R0MT | MWSA0518S-1R0MT | MWSA0603S-1R0MT | Compatibility / risk |
|---|---|---|---|---|---|
| Package | 4.0mm x 4.0mm | 5.2mm x 5.4mm | 5.2mm x 5.4mm | 6.6mm x 7.0mm | 5.2mm x 5.4mm / 6.6mm x 7.0mm / 7.1mm x 6.6mm — Larger footprint, requires board redesign.; MWSA0518S-1R0MT: Larger footprint, requires board redesign.; MWSA0603S-1R0MT: Significantly larger footprint, requires board redesign.; SMMS0630-1R0M: Significantly larger footprint, requires board redesign. |
| Current A | 5.8A | 7.8A | 8.0A | 12.0A | 7.8A / 8.0A / 12.0A / 13.0A — Higher current rating.; MWSA0518S-1R0MT: Higher current rating.; MWSA0603S-1R0MT: Higher current rating provides more thermal margin.; SMMS0630-1R0M: Much higher current rating. |
| Saturation Current A | 8.7A | 10.0A | 9.0A | 15.0A | 10.0A / 9.0A / 15.0A / 16.0A — Higher saturation current.; MWSA0518S-1R0MT: Slightly higher saturation current.; MWSA0603S-1R0MT: Higher saturation current, less inductance drop under load.; SMMS0630-1R0M: Much higher saturation current. |
| Dcr Ohm | 26mΩ | 14mΩ | 17mΩ | 7.4mΩ | 14mΩ / 17mΩ / 7.4mΩ / 6.6mΩ — Lower DCR improves efficiency.; MWSA0518S-1R0MT: Lower DCR improves efficiency.; MWSA0603S-1R0MT: Lower DCR improves power efficiency.; SMMS0630-1R0M: Much lower DCR improves power efficiency. |
Application & sourcing insights
Questions & answers
The best alternative depends on your design constraints. If you can redesign your PCB for a larger part, Sunlord's MWSA0603S-1R0MT offers a significant upgrade in current handling (12A RMS) and efficiency (7.4mΩ DCR).