Is there a pin-compatible replacement for P6SMAJ33CA?

No, a direct pin-compatible replacement in the same SMA package with matching key electricals was not found. All suitable functional alternatives require a PCB redesign for a larger package.

What risks should I check before replacing P6SMAJ33CA?

The main risk is the package mismatch; you must redesign your PCB for a larger SMC footprint. For some alternatives, you must also verify that a higher standoff voltage (e.g., 40V) is acceptable for your circuit's protection scheme.

P6SMAJ33CA Alternatives, Datasheet & Cross Reference | Liown Semiconductor Co., Ltd

P6SMAJ33CA is a 600W, 33V bidirectional TVS diode in an SMA package. While no direct drop-in replacements have been identified, several functional alternatives exist with upgraded power ratings in a larger SMC package, requiring board layout and electrical review.

AI replacement insight

Package riskhigh

All viable alternatives are in a larger SMC package, requiring a new PCB layout.

Electrical riskmedium

Some candidates have a higher standoff voltage, which must be verified for the application.

Can it be replaced directly?

No direct pin-to-pin, drop-in replacement was found. All viable alternatives require a PCB layout change due to a different package size (SMC vs. SMA).

Best replacement path

Consider SMDJ33CA for a matching 33V standoff voltage if the larger SMC package is acceptable. This offers a significant power handling upgrade.

Main risk

The primary risk is the package mismatch, requiring a PCB redesign. A secondary risk for some candidates is a higher standoff voltage, which could affect circuit protection levels.

Recommended alternatives

A functional alternative with matching voltage but a larger SMC package.

View details

Alternative comparison matrix

Feature / factor	P6SMAJ33CA	SMDJ33CA	SMDJ40CA	Compatibility / risk
Package	SMA (DO-214AC)	DO-214AB (SMC)	SMC (DO-214AB)	DO-214AB (SMC) / SMC (DO-214AB) — Candidate has a larger footprint (SMC vs SMA). Not a drop-in replacement.; SMDJ40CA: Candidate has a larger footprint (SMC vs SMA). Not a drop-in replacement.
Voltage	33.0V	33.0V	40.0V	33.0V / 40.0V — Reverse standoff voltage matches.; SMDJ40CA: Higher standoff voltage. Will not protect circuits below 40V.
Power	600.0W	3000.0W	3000.0W	3000.0W — Candidate has 5x higher peak pulse power rating.; SMDJ40CA: Candidate has 5x higher peak pulse power rating.
Current	11.3A	56.3A	46.5A	56.3A / 46.5A — Candidate has significantly higher peak pulse current rating.; SMDJ40CA: Candidate has significantly higher peak pulse current rating.

Application & sourcing insights

Questions & answers

The best alternative found is SMDJ33CA. It has the same 33V standoff voltage and higher power ratings, but comes in a larger SMC package that requires a PCB layout change.