Is there a pin-compatible replacement for SMAJ30CA-TR?

Yes, parts like P6SMAJ33CA and SMAJ33CA-13-F are pin-compatible in the same SMA package. However, they are not electrically identical, so they are not drop-in replacements. Their voltage characteristics must be verified for your application.

What risks should I check before replacing SMAJ30CA-TR?

The main risk is electrical. Check the candidate's clamping voltage (VCL) to ensure it's low enough to protect your circuit. Also, verify the stand-off voltage (VRM) is compatible with your normal operating voltage.

SMAJ30CA-TR Alternatives, Datasheet & Cross Reference | STMicroelectronics

SMAJ30CA-TR is a 400W, 30V bidirectional TVS diode in an SMA package. While no direct drop-in replacements are identified, several functional alternatives exist with the same package but require careful review of their higher voltage protection levels.

AI replacement insight

Electrical riskmedium

Higher clamping voltage in all candidates reduces protection margin.

Package risklow

All viable candidates use the same SMA package.

Can it be replaced directly?

No direct drop-in replacement with identical key parameters was found. All viable alternatives require engineering validation of their higher clamping voltage.

Best replacement path

P6SMAJ33CA offers a power upgrade (600W) but has a higher clamping voltage. SMAJ33CA-13-F is another option with matched power but also a higher clamping voltage.

Main risk

The primary risk is the higher clamping voltage of alternatives, which may not adequately protect sensitive downstream components.

Recommended alternatives

Functional alternative in the same package with higher power (600W), but review higher clamping voltage.

View details

Alternative comparison matrix

Feature / factor	SMAJ30CA-TR	P6SMAJ33CA	SMAJ33CA-13-F	Compatibility / risk
Package	SMA (DO-214AC)	SMA (DO-214AC)	SMA (DO-214AC)	SMA (DO-214AC) — Form factor matches.; SMAJ33CA-13-F: Form factor matches.
Polarity Or Type	Bidirectional	Bidirectional	Bidirectional	Bidirectional — Polarity matches.; SMAJ33CA-13-F: Polarity matches.
Power	400.0 W	600.0 W	400.0 W	600.0 W / 400.0 W — Higher power rating provides more robustness.; SMAJ33CA-13-F: Power rating matches.
Voltage	30.0 V	33.0 V	33.0 V	33.0 V — Higher standoff voltage.; SMAJ33CA-13-F: Higher standoff voltage.
Clamping Voltage	48.4 V	53.3 V	53.3 V	53.3 V — Higher clamping voltage offers less protection.; SMAJ33CA-13-F: Higher clamping voltage offers less protection.

Application & sourcing insights

Questions & answers

P6SMAJ33CA is a potential alternative with a higher power rating (600W), but its clamping voltage is higher at 53.3V. SMAJ33CA-13-F is another option with the same power rating but also a higher clamping voltage. Both require careful review.