
A pin-compatible, automotive-grade upgrade with higher current ratings and a wider temperature range.
Finding a replacement for the Sunlord WPN252010H1R0MT 1.0µH inductor involves matching its 2520 package, 2.5A current rating, and 3.5A saturation current. Several pin-compatible upgrades and functional alternatives are available.
Selecting a part with lower current ratings can cause failure.
Functional alternates in different packages require a PCB redesign.
Yes, parts like Sunlord's WPN252012E1R0MT and TDK's TFM252012ALMA1R0MTAA are strong pin-compatible candidates with improved electrical characteristics.
For a drop-in upgrade, consider WPN252012E1R0MT or TFM252012ALMA1R0MTAA, which offer higher current ratings in the same 2520 package.
The main risk is using a part with lower current ratings (Irms or Isat), which could lead to overheating or performance degradation under load.

A pin-compatible, automotive-grade upgrade with higher current ratings and a wider temperature range.
| Feature / factor | WPN252010H1R0MT | TFM252012ALMA1R0MTAA | WPN252012E1R0MT | HEI252012A-1R0M-Q8 | Compatibility / risk |
|---|---|---|---|---|---|
| Package | 2520 | 2520 (1008 Metric) | 2520 (1008 Metric) | 2520 (1008 Metric) | 2520 (1008 Metric) — Same package and dimensions.; WPN252012E1R0MT: Same package and dimensions.; HEI252012A-1R0M-Q8: Same package and dimensions.; SWPA252012S1R0MT: Same package and dimensions. |
| Current | 2.5 A | 3.7 A | 3.5 A | 3.6 A | 3.7 A / 3.5 A / 3.6 A / 2.1 A — Higher RMS current (Itemp) provides more thermal margin.; WPN252012E1R0MT: Higher RMS current provides more thermal margin.; HEI252012A-1R0M-Q8: Higher RMS current provides more thermal margin.; SWPA252012S1R0MT: Lower RMS current may cause overheating. |
| Saturation Current | 3.5 A | 4.2 A | 5.0 A | 4.4 A | 4.2 A / 5.0 A / 4.4 A / 2.9 A — Higher saturation current.; WPN252012E1R0MT: Higher saturation current prevents inductance drop at peak loads.; HEI252012A-1R0M-Q8: Higher saturation current.; SWPA252012S1R0MT: Lower saturation current may impact performance. |
| Dcr | 0.063 Ω | 0.042 Ω | 0.037 Ω | 0.042 Ω | 0.042 Ω / 0.037 Ω / 0.069 Ω — Lower DCR improves efficiency.; WPN252012E1R0MT: Lower DCR improves efficiency.; HEI252012A-1R0M-Q8: Lower DCR improves efficiency.; SWPA252012S1R0MT: Higher DCR reduces efficiency. |
| Temperature | -40°C to +125°C | -55°C to +150°C | - | - | -55°C to +150°C — Wider operating temperature range. |
The best alternatives are upgrades like Sunlord WPN252012E1R0MT or TDK TFM252012ALMA1R0MTAA, offering higher current handling and lower resistance in the same package.