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Best Alternatives to BAS321

Package: SOD-323Slkor(SLKORMICRO Elec.)Diodes - Rectifiers - SingleDiode Type: StandardVoltage - DC Reverse (Vr) (Max): 200 VRepetitive Peak Reverse Voltage (Vrrm): 250 VCurrent - Average Rectified (Io): 200 mAVoltage - Forward (Vf) (Max) @ If: 1.25 V @ 200 mA

Find the best replacements for the BAS321, a 200V, 200mA fast switching diode in a SOD-323 package. This guide reviews pin-compatible alternatives and functional substitutes, highlighting key parametric differences.

AI replacement insight

Electrical risklow

Low if Vf and trr are matched. High Vf can cause thermal issues.

Package risklow

SOD-323 is a standard package, so form-fit is generally not an issue.

Sourcing riskmedium

Check regional availability and authorization for selected vendor.

Can it be replaced directly?

Direct replacement for BAS321 should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

The onsemi BAS21HT1G is the strongest candidate, offering a direct parametric match with a higher voltage rating (250V) for improved safety margin.

Main risk

The main risk when substituting is ensuring the replacement's forward voltage (Vf) and reverse recovery time (trr) are suitable for the application to avoid efficiency loss or timing issues.

Recommended alternatives

3
BAS21HT1G package
BAS21HT1G

onsemi

Needs validationmedium risk

Strong parametric match in the same package with a higher voltage rating for more margin.

View details

Alternative comparison matrix

Feature / factorBAS321BAS21HT1GBAS21HBAS20HT1GCompatibility / risk
PackageSOD-323SOD-323SOD-323SOD-323SOD-323 — Package matches, enabling form-fit compatibility.; BAS21H: Package matches, enabling form-fit compatibility.; BAS20HT1G: Package matches, enabling form-fit compatibility.
Voltage200V250V250V200V250V / 200V — Higher voltage rating provides increased design margin.; BAS21H: Higher voltage rating provides increased design margin.; BAS20HT1G: Voltage rating matches but offers no safety margin.
Current200mA200mA200mA200mA200mA — Forward current rating matches the target.; BAS21H: Forward current rating matches the target.; BAS20HT1G: Forward current rating matches the target.
Trr50ns50ns50ns50ns50ns — Reverse recovery time matches, ensuring similar switching performance.; BAS21H: Reverse recovery time matches, ensuring similar switching performance.; BAS20HT1G: Reverse recovery time matches.
Vf1.25V1.25V--1.25V — Forward voltage matches, indicating similar efficiency.

Application & sourcing insights

Questions & answers

Verified drop-in options for BAS321 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.