WPN4020H4R7MT
Sunlord
Needs validationmedium risk
Functional alternative with matching footprint but higher DCR and different height.
Best Alternatives to SWPA4030S4R7MT
The Sunlord SWPA4030S4R7MT is a 4.7µH power inductor in a compact 4x4mm package. Finding a direct drop-in replacement is challenging, as most alternatives with similar or better electrical characteristics require a larger PCB footprint.
AI replacement insight
Package riskhigh
Most alternatives are in larger packages (5x5mm or 6x6mm) and are not drop-in compatible.
Electrical risklow
Most candidates offer superior current ratings and lower DCR, but one has significantly higher DCR.
Can it be replaced directly?
No direct, pin-compatible replacement for SWPA4030S4R7MT has been identified. All reviewed alternatives require PCB layout changes or have significant performance trade-offs.
Best replacement path
For new designs, consider electrically superior parts like Sunlord's SWPA6045S4R7MT or Sunltech's SLO0530H4R7MT, which offer better performance but require a larger PCB footprint.
Main risk
The primary risk is mechanical incompatibility. Most alternatives are physically larger and will not fit the original 4030 (4x4mm) footprint without a board redesign.
Recommended alternatives
4Alternative comparison matrix
| Feature / factor | SWPA4030S4R7MT | WPN4020H4R7MT | SLO0530H4R7MTT | SWPA6045S4R7MT | Compatibility / risk |
|---|---|---|---|---|---|
| Inductance | 4.7 µH | 4.7 µH | 4.7 µH | 4.7 µH | 4.7 µH — Inductance matches.; SLO0530H4R7MTT: Inductance matches.; SWPA6045S4R7MT: Inductance matches.; SMMS0630-4R7M: Inductance matches. |
| Saturation Current A | 3.2 A | 4.9 A | 4.5 A | 5.5 A | 4.9 A / 4.5 A / 5.5 A / 6.55 A — Higher saturation current is an upgrade.; SLO0530H4R7MTT: Higher saturation current is an upgrade.; SWPA6045S4R7MT: Higher saturation current is an upgrade.; SMMS0630-4R7M: Higher saturation current is an upgrade. |
| Dcr Ohm | 0.072 Ω | 0.225 Ω | 0.046 Ω | 0.03 Ω | 0.225 Ω / 0.046 Ω / 0.03 Ω / 0.035 Ω — Significantly higher DCR will reduce efficiency.; SLO0530H4R7MTT: Lower DCR improves efficiency.; SWPA6045S4R7MT: Lower DCR improves efficiency.; SMMS0630-4R7M: Lower DCR improves efficiency. |
| Package | 4030 (4x4x3mm) | 4020 (4x4x2mm) | 0530 (~5x5x3mm) | 6045 (6x6x4.5mm) | 4020 (4x4x2mm) / 0530 (~5x5x3mm) / 6045 (6x6x4.5mm) / 0630 (~7x7x3mm) — Footprint matches but height is smaller.; SLO0530H4R7MTT: Larger package will not fit on the same PCB footprint.; SWPA6045S4R7MT: Larger package will not fit on the same PCB footprint.; SMMS0630-4R7M: Larger package will not fit on the same PCB footprint. |
Application & sourcing insights
Questions & answers
While no drop-in replacement exists, parts like Sunlord's MWSA0503S-4R7MT or Sunltech's SLO0530H4R7MT offer superior electrical performance if a PCB redesign to accommodate a larger footprint (approx. 5x5mm) is possible.