SPH4018H3R3MT
Sunlord
Needs validationmedium risk
Likely pin-compatible with identical key ratings and improved DCR, from the same manufacturer family.
Best Alternatives to SWPA4018S3R3MT
SWPA4018S3R3MT is a 3.3µH, 2.9A shielded power inductor in a 4x4x1.8mm package. Several alternatives exist, including pin-compatible options with improved efficiency and functional upgrades that require a mechanical review.
AI replacement insight
Electrical risklow
Several candidates meet or exceed key electrical specifications.
Package riskmedium
Some functional alternatives have different heights requiring a fit check.
Firmware risklow
Not applicable for a passive component like an inductor.
Can it be replaced directly?
Direct replacement for SWPA4018S3R3MT should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
Best replacement path
SPH4018H3R3MT offers a direct replacement path with improved DCR.
Main risk
The primary risk is ensuring the substitute's current ratings (both saturation and temperature rise) and physical dimensions are fully compatible with the application.
Recommended alternatives
3Alternative comparison matrix
| Feature / factor | SWPA4018S3R3MT | SPH4018H3R3MT | SWPA4020S3R3MT | NRS4018T3R3MDGJ | Compatibility / risk |
|---|---|---|---|---|---|
| Inductance | 3.3µH | 3.3µH | - | - | 3.3µH — Inductance matches target. |
| Saturation Current A | 2.9A | 2.9A | 3.2A | 2.3A | 2.9A / 3.2A / 2.3A — Saturation current matches target.; SWPA4020S3R3MT: Higher saturation current is an upgrade.; NRS4018T3R3MDGJ: Lower saturation current is a downgrade risk. |
| Dcr Ohm | 0.091Ω max | 0.055Ω | 0.07Ω | 0.055Ω | 0.055Ω / 0.07Ω — Lower DCR improves efficiency.; SWPA4020S3R3MT: Lower DCR improves efficiency.; NRS4018T3R3MDGJ: Lower DCR improves efficiency. |
| Package | 4018 (4x4x1.8mm) | 4018 (4x4x1.8mm) | 4020 (4x4x2.0mm) | 4018 | 4018 (4x4x1.8mm) / 4020 (4x4x2.0mm) — Package dimensions match.; SWPA4020S3R3MT: Candidate is 0.2mm taller.; NRS4018T3R3MDGJ: Package size matches. |
| Temperature | -40°C to +125°C | -40°C to +125°C | - | -25°C to +125°C | -40°C to +125°C / -25°C to +125°C — Operating temperature range matches.; NRS4018T3R3MDGJ: Reduced operating temperature range. |
Application & sourcing insights
Questions & answers
Verified drop-in options for SWPA4018S3R3MT are limited in the current batch. Review candidates marked Strong match or Datasheet verified, and validate package, pinout, and electrical limits before committing a BOM change.