Needs validationmedium risk
An electrical upgrade with higher current and lower DCR, but in a larger package requiring a new PCB layout.
Best Alternatives to SWPA5040S2R2NT
Finding a substitute for the Sunlord SWPA5040S2R2NT, a 2.2µH power inductor, requires balancing physical fit with electrical performance. While form-fit options exist, they may have lower current ratings, and electrical upgrades often require a new PCB layout.
AI replacement insight
Electrical riskhigh
Form-fit options may have lower current ratings. Others have higher DCR, increasing power loss.
Package riskhigh
Most functional upgrades are in different packages, requiring a PCB layout change.
Can it be replaced directly?
No verified direct drop-in replacement exists. The closest form-fit candidate, SMNR5040-2R2MT, has lower current ratings and poses a high electrical risk.
Best replacement path
For existing PCBs, SMNR5040-2R2MT is the only form-fit option but has lower current ratings, requiring validation. For new designs, consider an upgraded part like SMMS1040-2R2M.
Main risk
Package mismatch for most alternatives, and electrical overstress from lower current ratings or higher DCR for others.
Recommended alternatives
4Alternative comparison matrix
| Feature / factor | SWPA5040S2R2NT | SMMS0650-2R2M | SMMS1040-2R2M | SMNR5040-2R2MT | Compatibility / risk |
|---|---|---|---|---|---|
| Package | 5040 | 0650 (7.1mm x 6.6mm) | 1040 | 5040 | 0650 (7.1mm x 6.6mm) / 1040 / 5040 / 0530 — Package is larger, requires new layout.; SMMS1040-2R2M: Package is much larger (10x10mm class), requires new layout.; SMNR5040-2R2MT: Same package dimensions (5.0x5.0mm).; SMMS0530-2R2M: Package dimensions differ, requires layout verification/change. |
| Saturation Current A | 5.5 A | 12.5 A | 18.0 A | 4.9 A | 12.5 A / 18.0 A / 4.9 A / 7.0 A — Significantly higher current handling.; SMMS1040-2R2M: Significantly higher current handling.; SMNR5040-2R2MT: Candidate current is ~11% lower, risk of saturation.; SMMS0530-2R2M: Higher saturation current. |
| Dcr Ohm | 0.019 Ω | 0.0112 Ω | 0.0072 Ω | 0.019 Ω | 0.0112 Ω / 0.0072 Ω / 0.019 Ω / 0.031 Ω — Lower DCR reduces power loss.; SMMS1040-2R2M: Much lower DCR reduces power loss.; SMNR5040-2R2MT: DC resistance is identical.; SMMS0530-2R2M: Higher DCR increases power loss. |
| Current A | 4.3 A | - | - | 3.8 A | 3.8 A — Candidate heat rating current is lower. |
| Tolerance | ±30% | - | - | ±20% | ±20% — Tighter tolerance is generally acceptable. |
Application & sourcing insights
Questions & answers
The best alternative depends on your priority. For a new design, SMMS1040-2R2M is a strong electrical upgrade. For an existing board, SMNR5040-2R2MT has the same package but its lower current ratings must be carefully validated.