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Best Alternatives to SS54SMA

Package: SMABORNDiodes - Rectifiers - SingleDiode Type: SchottkyVoltage - DC Reverse (Vr) (Max): 40 VCurrent - Average Rectified (Io): 5 AVoltage - Forward (Vf) (Max) @ If: 0.55 V @ 3 ACurrent - Reverse Leakage @ Vr: 1 mA @ 40 V

Find the best replacement for the SS54SMA, a 40V 5A Schottky diode. This guide provides verified alternatives, including direct upgrades and cross-vendor options, with detailed engineering analysis.

AI replacement insight

Electrical riskmedium

Candidates may have higher forward voltage (Vf), increasing power loss. Verify thermal performance.

Package risklow

All suggested alternatives use the compatible SMA / DO-214AC package.

Sourcing risklow

The target function is common, with many alternatives available from multiple vendors.

Can it be replaced directly?

Direct replacement for SS54SMA should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

SDT5A60SA-13 from Diodes Inc. is the best replacement path, offering an upgrade in voltage (60V vs 40V) and improved efficiency with a lower forward voltage.

Main risk

The primary risk when substituting is an increased forward voltage (Vf), which can lead to higher power dissipation and potential overheating if not accounted for.

Recommended alternatives

3
SDT5A60SA-13 package
SDT5A60SA-13

Diodes Incorporated

Needs validationlow risk

Upgrade with higher voltage rating (60V) and lower forward voltage for better efficiency.

View details

Alternative comparison matrix

Feature / factorSS54SMASDT5A60SA-13SS56 SMASS54Compatibility / risk
Polarity Or TypeSchottkySchottkySchottkySchottkySchottky — Trench Schottky technology.; SS56 SMA: matched; SS54: Multiple manufacturers available for this part number.
Voltage40V60V60V40V60V / 40V — Higher voltage rating provides more design margin.; SS56 SMA: Higher voltage rating provides more design margin.; SS54: matched
Current5A5A5A5A5A — matched; SS56 SMA: matched; SS54: matched
Voltage Forward0.55V @ 3A0.52V0.65V @ 5A0.55V @ 5A0.52V / 0.65V @ 5A / 0.55V @ 5A — Lower forward voltage reduces power loss.; SS56 SMA: Higher forward voltage may increase power loss.; SS54: Very similar to target's Vf.
PackageSMASMASMA (DO-214AC)SMA (DO-214AC)SMA / SMA (DO-214AC) — Package is physically compatible.; SS56 SMA: Package is physically compatible.; SS54: Package is physically compatible.

Application & sourcing insights

Questions & answers

Verified drop-in options for SS54SMA 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.