Is there a pin-compatible replacement for S2MW?

RS2MW and US2MW use the same SOD-123FL package and are expected to be pin-compatible. However, they are faster recovery diodes (fast/ultrafast) compared to the general-purpose S2MW, which may affect circuit performance and should be verified.

What risks should I check before replacing S2MW?

The main risk is functional. Replacing a general-purpose rectifier with a fast or ultrafast one (like RS2MW or US2MW) can introduce high-frequency ringing in some circuits. Always verify performance in your specific application.

S2MW Alternatives, Datasheet & Cross Reference | WILDGOOSE

S2MW is a general-purpose 1000V, 2A rectifier diode in a compact SOD-123FL package. When seeking alternatives, key parameters are voltage, current, package, and recovery speed.

AI replacement insight

Electrical riskmedium

Faster recovery time can introduce high-frequency ringing.

Package risklow

Candidates share the same SOD-123FL package.

Sourcing risklow

Multiple vendors produce similar parts in this package.

Can it be replaced directly?

No direct, one-to-one replacement has been identified. Candidates like RS2MW and US2MW match the package and primary ratings but are faster recovery diodes, which requires engineering review.

Best replacement path

Upgrade to a faster recovery diode like US2MW or RS2MW, which match key electrical ratings and package.

Main risk

Functional difference in recovery time; faster diodes may cause ringing in circuits not designed for them.

Recommended alternatives

A parametric match with a much faster recovery time, representing a potential performance upgrade.

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Alternative comparison matrix

Feature / factor	S2MW	US2MW	RS2MW	Compatibility / risk
Package	SOD-123FL	SOD-123FL	SOD-123FL	SOD-123FL — Package matches, ensuring form and fit.; RS2MW: Package matches, ensuring form and fit.
Voltage	1000V	1000V	1000V	1000V — Reverse voltage rating matches the target.; RS2MW: Reverse voltage rating matches the target.
Current	2.0A	2.0A	2.0A	2.0A — Forward current rating matches the target.; RS2MW: Forward current rating matches the target.
Diode Type	General Purpose	Ultrafast Recovery (trr=75ns)	Fast Recovery (trr=500ns)	Ultrafast Recovery (trr=75ns) / Fast Recovery (trr=500ns) — Candidate is an ultrafast diode, a significant performance change from the general purpose target.; RS2MW: Candidate is a fast recovery diode, target is general purpose. Requires review.

Application & sourcing insights

Questions & answers

The best alternative depends on the application's sensitivity to recovery speed. US2MW offers an upgrade to ultrafast recovery, while RS2MW is a fast-recovery option. Both match the voltage, current, and package of the S2MW.