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Best Alternatives to SMAJ33CA

Package: DO-214AC (SMA)Microdiode Semiconductor (Shenzhen) Co., Ltd.Transient Voltage Suppressors (TVS)Peak Pulse Power: 400 WReverse Standoff Voltage: 33 VBreakdown Voltage: 36.7 V - 40.6 VMaximum Clamping Voltage: 53.3 VPeak Pulse Current: 7.5 A

SMAJ33CA is a popular 400W, 33V bidirectional TVS diode in an SMA package. Several pin-compatible alternatives from major manufacturers like Bourns and Vishay are available, offering direct replacement options. Functional alternatives with different packages provide higher pow...

AI replacement insight

Package riskhigh

High risk for functional alternates (SMB/SMC) that require a PCB redesign.

Electrical riskmedium

Medium risk for parts with lower standoff voltage (SMAJ30CA) or lower current (SMAJ36CA).

Sourcing risklow

Low risk as this is a multi-sourced, common TVS diode.

Can it be replaced directly?

Direct replacement for SMAJ33CA should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

Use a cross-vendor SMAJ33CA from a major manufacturer like Bourns or Vishay for a direct, low-risk replacement.

Main risk

The main risk is using a part with a different package (e.g., SMB, SMC) which requires a new PCB layout, or a part with a lower standoff voltage (e.g., 30V) which could fail in the application.

Recommended alternatives

2
SMAJ33CA package
SMAJ33CA

MDD

Needs validationlow risk

Cross-vendor part from Bourns with identical package, voltage, and power ratings, serving as a pin-compatible replacement.

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Alternative comparison matrix

Feature / factorSMAJ33CASMAJ33CASMAJ36CAAlt 3Compatibility / risk
PackageDO-214AC, SMADO-214AC (SMA)SMA (DO-214AC)DO-214AC (SMA) / SMA (DO-214AC) — Package is identical, enabling drop-in replacement.; SMAJ36CA: Package is identical.
Voltage33.0V33.0V36.0V33.0V / 36.0V — Reverse standoff voltage is identical.; SMAJ36CA: Higher standoff voltage provides more margin.
Power400.0W400.0W400.0W400.0W — Peak pulse power rating is identical.; SMAJ36CA: Power rating is identical.
Current7.5A7.5A6.9A7.5A / 6.9A — Peak pulse current is identical.; SMAJ36CA: Peak pulse current is slightly lower.
Polarity Or TypeBidirectionalBi-directional-Bi-directional — Polarity is identical.

Application & sourcing insights

Questions & answers

Verified drop-in options for SMAJ33CA 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.