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Best Alternatives to SMAJ24A

Package: DO-214AC (SMA)Microdiode Semiconductor (Shenzhen) Co., Ltd.Transient Voltage Suppressors (TVS)Peak Pulse Power: 400 WReverse Stand-Off Voltage (VRWM): 24 VBreakdown Voltage (VBR): 26.7 V - 29.5 VMaximum Clamping Voltage (VC): 38.9 VPeak Pulse Current (IPP): 10.28 A

SMAJ24A is a widely used 400W, 24V unidirectional TVS diode in a DO-214AC (SMA) package for circuit protection. This page provides an engineering review of potential substitutes, including pin-compatible options and functional alternatives.

AI replacement insight

Electrical risklow

If using a cross-vendor SMAJ24A, electrical risk is low as key specs match.

Package riskhigh

High risk if selecting a part from a different series (e.g., SMBJ) which has a different footprint.

Sourcing risklow

SMAJ24A is a widely available, multi-sourced component.

Can it be replaced directly?

Direct replacement for SMAJ24A should use only Datasheet verified or Strong match candidates; many approved options still require engineering review.

Best replacement path

Start with Datasheet verified or Strong match candidates for SMAJ24A, then review parametric alternatives for package and electrical fit.

Main risk

The main risk is selecting a part with an incorrect package (e.g., SMBJ series) or wrong polarity (e.g., the bidirectional SMAJ24CA).

Recommended alternatives

2
SMAJ24A package
SMAJ24A

BOURNS

Needs validationlow risk

A pin-compatible alternative from a different manufacturer with matching key electrical ratings.

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Alternative comparison matrix

Feature / factorSMAJ24ASMAJ24ASMAJ26AAlt 3Compatibility / risk
PackageDO-214AC (SMA)DO-214AC (SMA)DO-214AC (SMA)DO-214AC (SMA) — Package matches, enabling drop-in replacement.; SMAJ26A: Package matches, form-fit is compatible.
Polarity Or TypeUnidirectionalUnidirectional-Unidirectional — Polarity matches the target part.
Voltage V24.0V24.0V26.0V24.0V / 26.0V — Standoff voltage is identical.; SMAJ26A: Higher standoff voltage is generally safe.
Current A10.3A10.3A9.5A10.3A / 9.5A — Peak pulse current rating is identical.; SMAJ26A: Lower peak pulse current rating is a downgrade risk.
Power W400.0W400.0W-400.0W — Peak pulse power rating is identical.

Application & sourcing insights

Questions & answers

Verified drop-in options for SMAJ24A 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.