What risks should I check before replacing S1ML?

Before replacing S1ML, first check the package compatibility to avoid a board redesign. Second, verify key electrical parameters like forward voltage (Vf) and recovery time (trr), as deviations can affect efficiency and circuit behavior.

S1ML Alternatives, Datasheet & Cross Reference | Taiwan Semiconductor Co., Ltd.

S1ML is a 1A, 1000V standard rectifier diode in a SOD-123FL package, now marked as Not For New Designs. We've identified several alternatives, with SM4007PL-TP being a strong candidate for direct replacement.

AI replacement insight

Electrical risklow

For SM4007PL-TP, the only risk is a minor increase in forward voltage. Other parts have larger differences.

Package riskhigh

Many functional alternatives exist in different packages (SMA, SMC), which are not direct replacements.

Can it be replaced directly?

Direct replacement for S1ML should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

The best replacement path is SM4007PL-TP, which matches the package and key electrical ratings, requiring minimal requalification.

Main risk

The main risk when substituting S1ML is either choosing a part with a different package that requires a PCB redesign, or a part with different electrical characteristics like forward voltage or recovery time that could impact circuit performance.

Recommended alternatives

A strong alternative in the same package with identical voltage and current ratings.

View details

Alternative comparison matrix

Feature / factor	S1ML	SM4007PL-TP	F1M	Compatibility / risk
Package	SOD-123FL	SOD-123FL	SOD-123FL	SOD-123FL — Package is physically compatible.; F1M: Package is physically compatible.
Voltage	1000V	1000V	1000V	1000V — Reverse voltage rating is identical.; F1M: Reverse voltage rating is identical.
Current	1A	1A	-	1A — Average rectified current is identical.
Forward Voltage	1.0V @ 1A	1.1V @ 1A	1.3V @ 1A	1.1V @ 1A / 1.3V @ 1A — Slightly higher Vf may increase power dissipation.; F1M: Higher Vf will increase power dissipation.
Temperature	-55°C to +150°C	-65°C to +175°C	-	-65°C to +175°C — Wider operating temperature range.
Diode Type	Standard	-	Fast Recovery (500ns)	Fast Recovery (500ns) — Candidate is Fast Recovery, target is Standard.

Application & sourcing insights

Questions & answers

Verified drop-in options for S1ML 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.