Is there a pin-compatible replacement for SMFJ28CA?

Yes, parts like SMFJ30CA and SMF30CA share the same SOD-123FL package and are pin-compatible. However, their electrical parameters differ, requiring careful evaluation before use.

What risks should I check before replacing SMFJ28CA?

Key risks include: 1) Polarity mismatch (must be bi-directional). 2) Standoff voltage changes, affecting protection levels. 3) Lower peak pulse current (Ipp) rating, which can reduce surge survivability.

SMFJ28CA Alternatives, Datasheet & Cross Reference | BORN

SMFJ28CA is a 200W, 28V bi-directional TVS diode in a SOD-123FL package. Finding a direct drop-in replacement requires careful matching of standoff voltage, peak current, and polarity.

AI replacement insight

Electrical riskmedium

Candidates have different voltage/current ratings.

Package risklow

Candidates share the same SOD-123FL package.

Sourcing risklow

Multiple vendors offer similar parts.

Can it be replaced directly?

No direct, 1-to-1 replacement was identified. All viable candidates have parametric differences requiring engineering review.

Best replacement path

Use a parametric alternative like SMFJ30CA, but verify the impact of its higher 30V standoff voltage and lower 4.1A peak current rating.

Main risk

The primary risk is using a part with a lower current rating or incorrect standoff voltage, which could lead to component failure or inadequate circuit protection.

Recommended alternatives

Parametric alternative in the same package with slightly higher voltage and lower current rating.

View details

Alternative comparison matrix

Feature / factor	SMFJ28CA	SMFJ30CA	SMF30CA	Compatibility / risk
Package	SOD-123FL	SOD-123FL	SOD-123FL	SOD-123FL — Form factor matches.; SMF30CA: Form factor matches.
Polarity Or Type	Bi-Directional	Bi-directional	Bidirectional	Bi-directional / Bidirectional — Polarity matches.; SMF30CA: Polarity matches.
Voltage V	28.0V	30.0V	30.0V	30.0V — Higher standoff voltage may alter protection threshold.; SMF30CA: Higher standoff voltage may alter protection threshold.
Current A	4.4A	4.1A	4.1A	4.1A — Lower peak pulse current rating reduces surge capacity.; SMF30CA: Lower peak pulse current rating reduces surge capacity.
Power W	200.0W	200.0W	-	200.0W — Peak pulse power matches.

Application & sourcing insights

Questions & answers

SMFJ30CA is a close parametric alternative from the same manufacturer, but has a slightly higher standoff voltage (30V) and lower peak current (4.1A). Engineering review is essential.