ProjectsPricingInsights

Best Alternatives to S1M

Package: DO-214AC (SMA)MDD(Microdiode Semiconductor)DiodesReverse Voltage (Vr): 1000 VAverage Forward Current: 1 AForward Voltage (Vf): 1.1 VPeak Forward Surge Current: 30 AReverse Leakage Current: 5 uA

S1M is a standard 1000V, 1A general-purpose rectifier in a common DO-214AC (SMA) package. Several pin-compatible alternatives like GS1M and GN1M exist, offering similar performance for general rectification applications.

AI replacement insight

Electrical risklow

Low if replacing with another standard rectifier of same or higher ratings.

Package riskmedium

Medium risk of confusing the DO-214AC (SMA) package with the visually similar DO-214AA (SMB).

Can it be replaced directly?

Direct replacement for S1M should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

Use GS1M or GN1M for a like-for-like replacement. For enhanced reliability, consider the SM520 as an electrical upgrade.

Main risk

The primary risk is substituting with a fast-recovery diode (e.g., ES2M, US2M) instead of a standard one, which can cause circuit malfunction.

Recommended alternatives

4
SM520 package
SM520

GOODWORK

Needs validationlow risk

A robust upgrade with higher voltage (2000V) and current (1.5A) ratings in the same SMA package.

View details

Alternative comparison matrix

Feature / factorS1MSM520GN1MGS1MCompatibility / risk
PackageDO-214AC (SMA)DO-214AC (SMA)DO-214AC (SMA)DO-214AC (SMA)DO-214AC (SMA) — Form and fit are identical.; GN1M: Form and fit are identical.; GS1M: Form and fit are identical.; M7 1N4007: Form and fit are identical.
Voltage1000V2000V1000V1000V2000V / 1000V — Higher voltage rating provides more design margin.; GN1M: Identical reverse voltage rating.; GS1M: Identical reverse voltage rating.; M7 1N4007: Identical reverse voltage rating.
Current1.0A1.5A1.0A1.0A1.5A / 1.0A — Higher current rating provides more design margin.; GN1M: Identical average forward current.; GS1M: Identical average forward current.; M7 1N4007: Identical average forward current.
ApplicationStandard--StandardStandard — Both are standard recovery general-purpose rectifiers.

Application & sourcing insights

Questions & answers

Verified drop-in options for S1M 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.