IRLML2502
YENJI
Needs validationlow risk
Strong alternative with lower Rds(on) and higher current, but Vds has no margin. Pinout verification needed.
Best Alternatives to SI2302-2.3A-JSM
The SI2302-2.3A-JSM is a common 20V N-Channel MOSFET in a SOT-23 package, used for low-voltage switching. Finding a replacement requires matching the low Rds(on) and gate threshold voltage.
AI replacement insight
Electrical riskmedium
Some alternatives have higher Rds(on) or no Vds margin. Vgs(th) compatibility should also be checked.
Package risklow
All candidates use the SOT-23 package, but pinout must be verified against the datasheet before use.
Can it be replaced directly?
Direct replacement for SI2302-2.3A-JSM should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.
Best replacement path
Upgrade to a part like IRLML2502 for lower Rds(on) and higher current, but verify the 20V Vds is sufficient for your design.
Main risk
The main risk is using a substitute with higher on-resistance (Rds(on)), which can cause overheating and reduced efficiency.
Recommended alternatives
4Alternative comparison matrix
| Feature / factor | SI2302-2.3A-JSM | IRLML2502 | SI2300 | FS2310 | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SOT-23 | SOT-23 | SOT-23 | SOT-23 | SOT-23 — Package matches, pinout requires verification.; SI2300: Package matches, pinout requires verification.; FS2310: Package matches, pinout requires verification.; AO3422: Package matches, pinout requires verification. |
| Voltage | 20 V | 20 V | 20 V | 60 V | 20 V / 60 V — Vds matches but has no safety margin over target.; SI2300: Vds matches but has no safety margin over target.; FS2310: Higher Vds provides significant safety margin.; AO3422: Higher Vds provides significant safety margin. |
| Current | 2.3 A | 4 A | 6 A | 3 A | 4 A / 6 A / 3 A — Higher current handling capability.; SI2300: Significantly higher current handling capability.; FS2310: Higher current handling capability.; AO3422: Higher current handling capability. |
| Resistance | 60 mΩ @ 4.5V | 30 mΩ | 48 mΩ @ 4.5V | 120 mΩ @ 4.5V | 30 mΩ / 48 mΩ @ 4.5V / 120 mΩ @ 4.5V / 125 mΩ @ 4.5V — Lower Rds(on) improves efficiency.; SI2300: Lower Rds(on) improves efficiency.; FS2310: Rds(on) is double, will increase losses.; AO3422: Rds(on) is more than double, will increase losses. |
| Power | 400 mW | 1.56 W | - | 1.2 W | 1.56 W / 1.2 W / 350 mW — Higher power dissipation rating.; FS2310: Higher power dissipation rating.; AO3422: Lower power dissipation rating. |
| Vgs(Th) | 1.1V max | - | 0.45-1V | - | 0.45-1V — Threshold voltage is compatible. |
Application & sourcing insights
Questions & answers
Verified drop-in options for SI2302-2.3A-JSM are limited in the current batch. Review candidates marked Strong match or Datasheet verified, and validate package, pinout, and electrical limits before committing a BOM change.