
Serpac
6003 may fit the same SOT-23 N-MOSFET role, but Rds and pinout need review.
SI2302S is a 20V, 3A SOT-23 N-channel MOSFET. The listed alternatives need FAE review because pinout evidence is missing.
Rds, Id and Pd differ.
SOT-23 matches, pin map missing.
Discrete MOSFET.
No direct verified cross.
No verified pin-compatible replacement is proven from the provided fields.
Start with 6003, then verify pinout, Rds at 4.5V, and thermal limits.
Pinout and power loss are not fully verified.

Serpac
6003 may fit the same SOT-23 N-MOSFET role, but Rds and pinout need review.
| Feature / factor | SI2302S | 6003 | BSS205NH6327 | Alt 3 | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SOT-23 | SOT-23 | SOT-23 | SOT-23 — same case; BSS205NH6327: same case | |
| Pinout | 3-pin map needed | missing | missing | missing — not proven; BSS205NH6327: not proven | |
| Voltage | 20V | 60V | 20V | 60V / 20V — meets margin; BSS205NH6327: no 1.1x margin | |
| Current | 3A | 3A | 2.5A | 3A / 2.5A — same Id; BSS205NH6327: derated load only | |
| Resistance | 60mΩ@4.5V | 100mΩ@10V | - | 100mΩ@10V — higher loss | |
| Power | 1W | - | 0.5W | 0.5W — thermal risk |
From the provided data, 6003 is the closest candidate, but it is not verified as a drop-in replacement.