
A strong alternative in the same 0402 package with higher current rating, but has a wider inductance tolerance.
Finding a substitute for the Sunlord SDFL1005QR68KTF 680nH inductor involves balancing package compatibility with electrical parameters. While several functional alternatives exist, careful review of inductance tolerance and physical size is required for a successful replacement.
Most alternatives are in larger packages (0603, 0805) and are not drop-in compatible with the 0402 footprint.
The closest package-matched option has a wider inductance tolerance (±20% vs ±10%) which must be validated.
No verified direct, drop-in replacement is available. MLZ1005MR68WT000 is the closest candidate but requires review of its wider inductance tolerance.
If the application can tolerate a wider inductance range (±20%), MLZ1005MR68WT000 is the best path as it matches the 0402 package. Otherwise, a layout change is needed for other functional upgrades.
The primary risk is package mismatch. Many alternatives offer better electrical performance but in larger 0603 or 0805 packages, requiring a PCB redesign.

A strong alternative in the same 0402 package with higher current rating, but has a wider inductance tolerance.
| Feature / factor | SDFL1005QR68KTF | MLZ1005MR68WT000 | FHW0805UCR68JGT | Alt 3 | Compatibility / risk |
|---|---|---|---|---|---|
| Package | 1005 (0402) | 0402 (1005 Metric) | 0805 | 0402 (1005 Metric) / 0805 — Package size is compatible.; FHW0805UCR68JGT: Larger package requires PCB layout change. | |
| Inductance | 680nH | 680nH | 680nH | 680nH — matched; FHW0805UCR68JGT: matched | |
| Tolerance | ±10% | ±20% | ±5% | ±20% / ±5% — Wider tolerance may impact performance in sensitive circuits.; FHW0805UCR68JGT: Tighter tolerance is an upgrade. | |
| Current | 15mA | 110mA | 500mA | 110mA / 500mA — Significantly higher current rating.; FHW0805UCR68JGT: Significantly higher current rating. | |
| Dcr | 0.8Ω | 0.23Ω | 0.38Ω | 0.23Ω / 0.38Ω — Lower DCR improves efficiency.; FHW0805UCR68JGT: Lower DCR improves efficiency. |
The best alternative is likely MLZ1005MR68WT000 from TDK. It matches the 680nH inductance and 0402 package, but its wider tolerance (±20% vs ±10%) must be verified for your application.