Is there a pin-compatible replacement for P4SMA30CA?

Yes, SMAJ30CA is a pin-compatible replacement in the same DO-214AC (SMA) package. As it is from a different manufacturer, reviewing the full datasheet for minor parametric differences is recommended.

What risks should I check before replacing P4SMA30CA?

When replacing P4SMA30CA, the main risk is a mismatch in standoff voltage. An alternative with a higher voltage (e.g., SMAJ33CA) may not adequately protect the circuit. Always verify the package, polarity (bidirectional), and standoff voltage match your design's requirements.

P4SMA30CA Alternatives, Datasheet & Cross Reference | BOURNS

P4SMA30CA is a 400W, 30V bidirectional TVS diode in a standard SMA package. This page reviews and compares potential alternatives like SMAJ30CA and SMAJ33CA for circuit protection applications.

AI replacement insight

Electrical riskmedium

Risk is low for SMAJ30CA, but medium to high for alternatives with higher standoff voltage.

Package risklow

All candidates use the standard DO-214AC (SMA) package, ensuring form and fit compatibility.

Sourcing risklow

The SMAJ series is a widely available, multi-sourced product line.

Can it be replaced directly?

Yes, SMAJ30CA is a direct cross-vendor replacement for P4SMA30CA, sharing the same critical specifications and package.

Best replacement path

Use SMAJ30CA from a different reputable manufacturer as a direct cross-reference.

Main risk

Using a part with a higher standoff voltage (e.g., >33V) will reduce circuit protection effectiveness.

Recommended alternatives

SMAJ30CA is a cross-vendor alternative with matching key electrical ratings and package.

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Alternative comparison matrix

Feature / factor	P4SMA30CA	SMAJ30CA	SMAJ33CA	Compatibility / risk
Package	DO-214AC (SMA)	DO-214AC (SMA)	DO-214AC (SMA)	DO-214AC (SMA) — Same package and footprint.; SMAJ33CA: Same package and footprint.
Voltage	30.0V	30.0V	33.0V	30.0V / 33.0V — Reverse standoff voltage matches.; SMAJ33CA: Standoff voltage is 10% higher, reducing protection margin.
Polarity Or Type	Bidirectional	Bidirectional	Bidirectional	Bidirectional — Polarity matches.; SMAJ33CA: Polarity matches.
Power	400.0W	400.0W	400.0W	400.0W — Peak pulse power matches.; SMAJ33CA: Peak pulse power matches.

Application & sourcing insights

Questions & answers

SMAJ30CA from other manufacturers is the best alternative, offering the same package and key electrical ratings like 30V standoff voltage and 400W power dissipation.