Is there a pin-compatible replacement for JSM2301S?

SI2323 shares the common SOT-23 package and is a P-Channel MOSFET, making it a likely pin-compatible candidate. However, pinout must be verified from the datasheets before use.

What risks should I check before replacing JSM2301S?

Key risks include verifying the pinout (Gate, Drain, Source), ensuring the gate drive voltage is compatible, and checking if the higher current and lower Rds(on) of a replacement affect circuit timing or behavior.

JSM2301S Alternatives, Datasheet & Cross Reference | JSMSEMI

JSM2301S is a -20V, -1.8A P-Channel MOSFET in a SOT-23 package. A strong alternative is SI2323, which offers improved electrical ratings in the same package, pending pinout verification.

AI replacement insight

Electrical risklow

Candidate offers superior electrical performance (higher current, lower Rds(on)).

Package risklow

Both use the same SOT-23 package, but pinout must be confirmed.

Can it be replaced directly?

SI2323 is a strong candidate for direct replacement after pinout verification, as it matches key specs and package.

Best replacement path

SI2323 offers an upgrade path with significantly better Rds(on) and current handling in the same package.

Main risk

The primary risk is assuming pin-for-pin compatibility without checking the datasheet, although SOT-23 MOSFETs often share a standard pinout.

Recommended alternatives

Strong P-Channel alternative in the same SOT-23 package with higher current and lower on-resistance.

View details

Alternative comparison matrix

Feature / factor	JSM2301S	SI2323	Compatibility / risk
Polarity Or Type	P-Channel	P-Channel	P-Channel — Channel type matches.
Package	SOT-23	SOT-23	SOT-23 — Package matches, enabling form-fit compatibility.
Voltage	-20 V	-20 V	-20 V — Drain-Source Voltage (Vds) matches.
Current	-1.8 A	-5 A	-5 A — Continuous Drain Current (Id) is significantly higher.
Rds On Ohm	250 mΩ @ -2.5V	45 mΩ @ -4.5V	45 mΩ @ -4.5V — On-resistance is much lower, improving efficiency.
Power	0.35 W	1.31 W	1.31 W — Power dissipation is higher, improving thermal margin.

Application & sourcing insights

Questions & answers

SI2323 is a strong alternative, offering higher current (-5A) and lower on-resistance (45mΩ) in the same SOT-23 package. It is a potential upgrade but requires datasheet review.