Is there a pin-compatible replacement for SI2308A?

The FS2310 and AO3422 use the same SOT-23 package, which is likely pin-compatible. However, you must verify the pinout (Gate, Drain, Source) in the datasheets as variations can exist.

What risks should I check before replacing SI2308A?

The main risks are electrical and thermal. Ensure the replacement's VDS and ID ratings are sufficient. Critically, check the RDS(on) and power dissipation (PD) to avoid overheating and efficiency loss. Always verify the pinout.

SI2308A Alternatives, Datasheet & Cross Reference | UMW

Searching for a replacement for the SI2308A N-Channel MOSFET? We've analyzed several alternatives to help you find a suitable part, focusing on key parameters like voltage, current, and on-resistance.

AI replacement insight

Electrical riskmedium

RDS(on) differences affect efficiency and heat generation. Power dissipation must be carefully checked.

Package risklow

SOT-23 package is standard, but pinout must be verified in the datasheet before layout or assembly.

Sourcing risklow

This is a common MOSFET type with multiple potential alternatives available in the market.

Can it be replaced directly?

No drop-in replacement has been identified; all candidates require some level of review. The FS2310 is the closest functional match.

Best replacement path

FS2310 is the most promising candidate, but requires engineering review of thermal performance.

Main risk

Thermal performance degradation due to higher on-resistance (RDS(on)) or lower power dissipation (PD) in substitutes.

Recommended alternatives

A functional alternative in the same SOT-23 package with similar voltage and current ratings.

View details

Alternative comparison matrix

Feature / factor	SI2308A	FS2310	AO3422	Compatibility / risk
Voltage	60V	60V	60V	60V — Drain-Source Voltage (VDS) matches.; AO3422: Drain-Source Voltage (VDS) matches.
Current	3A	3A	3A	3A — Continuous Drain Current (ID) matches.; AO3422: Continuous Drain Current (ID) matches.
Resistance	80mΩ @ 10V	100mΩ @ 10V	105mΩ @ 10V	100mΩ @ 10V / 105mΩ @ 10V — RDS(on) is slightly higher, may increase losses.; AO3422: RDS(on) is higher, will increase losses.
Power	1.25W	1.2W	0.35W	1.2W / 0.35W — Power Dissipation is slightly lower.; AO3422: Power Dissipation is significantly lower, high risk of failure.
Package	SOT-23	SOT-23	SOT-23	SOT-23 — Package matches, pinout must be verified.; AO3422: Package matches, pinout must be verified.

Application & sourcing insights

Questions & answers

The FS2310 is a strong functional alternative with very similar parameters. However, its slightly higher on-resistance and lower power rating require careful review of your circuit's thermal performance.