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Best Alternatives to SK34WA

Package: SOD-123FUXINSEMIDiodesReverse Voltage (Vr): 40VAverage Forward Rectified Current: 3AForward Voltage (Vf): 0.55V @ 3AReverse Leakage Current (Ir): 0.5mA @ 40VPeak Forward Surge Current: 80A

SK34WA is a 40V, 3A Schottky diode in a SOD-123 package. Key considerations for finding a replacement include matching the low forward voltage (0.55V) to manage efficiency and thermal performance.

AI replacement insight

Electrical riskhigh

Alternatives with higher forward voltage will increase power dissipation and heat.

Package risklow

Many alternatives exist in the same SOD-123 package, minimizing layout changes.

Can it be replaced directly?

Direct replacement for SK34WA should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

DSS34 by FUXINSEMI is the strongest candidate, offering a direct parametric match in the same package.

Main risk

The primary risk when considering other alternatives is an increased forward voltage (Vf), which impacts power efficiency and thermal management.

Recommended alternatives

2
DSS34 package
DSS34

FUXINSEMI

Needs validationlow risk

Excellent alternative with identical key electrical ratings (40V, 3A, 0.55Vf) and package.

View details

Alternative comparison matrix

Feature / factorSK34WADSS34SS36FAAlt 3Compatibility / risk
PackageSOD-123SOD-123SOD-123SOD-123 — Identical package ensures form and fit.; SS36FA: Identical package ensures form and fit.
Voltage40V40V60V40V / 60V — Reverse voltage rating is identical.; SS36FA: Higher voltage rating provides more design margin.
Current3A3A3A3A — Forward current rating is identical.; SS36FA: Forward current rating is identical.
Forward Voltage0.55V @ 3A0.55V @ 3A0.7V @ 3A0.55V @ 3A / 0.7V @ 3A — Forward voltage matches, ensuring similar efficiency.; SS36FA: Higher Vf will increase power loss and heat.

Application & sourcing insights

Questions & answers

Verified drop-in options for SK34WA 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.