ProjectsPricingInsights

Best Alternatives to SMBJ30A

Package: DO-214AA (SMB)Microdiode Semiconductor (Shenzhen) Co., Ltd.Transient Voltage Suppressors (TVS)Standoff Voltage (VRWM): 30 VClamping Voltage (VC): 48.4 VPeak Pulse Power: 600 WPeak Pulse Current (IPP): 12.4 ABreakdown Voltage (VBR): 33.3 V - 36.8 V

The SMBJ30A is a popular 600W, 30V unidirectional TVS diode in an SMB (DO-214AA) package, widely used for transient voltage protection. Multiple manufacturers offer pin-compatible versions, making sourcing flexible.

AI replacement insight

Electrical risklow

Key parameters are standardized, but secondary specs like clamping voltage can vary slightly.

Package risklow

The DO-214AA (SMB) package is a well-defined industry standard.

Sourcing risklow

This is a high-volume, multi-sourced commodity part.

Can it be replaced directly?

Direct replacement for SMBJ30A should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

Cross-referencing to an SMBJ30A from a different major manufacturer like Bourns or Littelfuse is the most reliable path.

Main risk

Minor variations in clamping voltage and breakdown voltage ranges between different manufacturers.

Recommended alternatives

2
SMBJ30A package
SMBJ30A

BOURNS

Needs validationlow risk

This is a cross-vendor alternative with identical key specs and package, likely a pin-to-pin replacement.

View details

Alternative comparison matrix

Feature / factorSMBJ30ASMBJ30ASMBJ33AAlt 3Compatibility / risk
PackageDO-214AA (SMB)DO-214AA (SMB)DO-214AA (SMB)DO-214AA (SMB) — Package is a standard for this part series.; SMBJ33A: Form and fit are identical.
Pinout22-2 — Standard 2-pin diode package.
Voltage30.0V30.0V33.0V30.0V / 33.0V — Standoff voltage matches.; SMBJ33A: Higher standoff voltage may affect protection level.
Current12.4A12.4A11.26A12.4A / 11.26A — Peak pulse current matches.; SMBJ33A: Lower peak pulse current rating.
Power600.0W600.0W600.0W600.0W — Peak pulse power matches.; SMBJ33A: Peak pulse power matches.

Application & sourcing insights

Questions & answers

Verified drop-in options for SMBJ30A 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.