
UNI-ROYAL
25121WF330LT4E matches 330mΩ and 1W but needs a 2512 footprint.
1206W4F330LT5E is a 330mΩ, ±1%, 0.25W 1206 thick film resistor. No verified drop-in replacement is shown here.
300mΩ changes sense ratio.
2512 and 0603 do not fit 1206 pads.
No firmware interface.
PDF checks are pending.
No verified pin-compatible replacement was confirmed from the provided data.
Use FRL1206FR300TS only if 300mΩ is acceptable; use 25121WF330LT4E only with PCB footprint review.
Resistance change and footprint mismatch are the main risks.

UNI-ROYAL
25121WF330LT4E matches 330mΩ and 1W but needs a 2512 footprint.
| Feature / factor | 1206W4F330LT5E | 25121WF330LT4E | FRL1206FR300TS | 1206W4F300LT5E | Compatibility / risk |
|---|---|---|---|---|---|
| Resistance | 330mΩ | 330mΩ | - | - | 300mΩ — 9% lower |
| Tolerance | ±1% | ±1% | - | - | ±1% — same tolerance |
| Power | 0.25W | 1W | - | - | 0.25W — no 1.5x margin |
| Package | 1206 | 2512 | - | - | 1206 — same case |
| Pinout | 2 | 2 | - | - | 2 — 2 terminals |
No direct verified alternative is shown. FRL1206FR300TS is the closest same-package relaxed-value option.