Is there a pin-compatible replacement for 1.5SMBJ30CA?

No direct pin-compatible replacement with the same power rating has been identified. SM6T36CA shares the same package but has a much lower 600W power rating, making it a high-risk downgrade.

What risks should I check before replacing 1.5SMBJ30CA?

First, verify the package (SMB/DO-214AA). Second, ensure the replacement is bidirectional. Finally, confirm the power rating is at least 1500W and the standoff voltage is near 30V to avoid circuit damage.

1.5SMBJ30CA Alternatives, Datasheet & Cross Reference | BOURNS

1.5SMBJ30CA is a 1500W, 30V bidirectional TVS diode in a compact SMB package, widely used for surge protection. Finding a direct drop-in replacement requires matching the package, polarity, and key electrical ratings.

AI replacement insight

Package riskhigh

Most alternatives require a PCB layout change from SMB to SMC.

Electrical risklow

Electrically similar or stronger parts are available if package is not a constraint.

Sourcing riskmedium

TVS diodes are common, but exact matches can be constrained.

Can it be replaced directly?

There are no verified direct, pin-to-pin replacements for 1.5SMBJ30CA in our catalog. Alternatives exist but have different packages or lower power ratings.

Best replacement path

The best path is using a functional alternative like SMCJ30CA, which matches electrical specs but requires a PCB layout change for its larger SMC package.

Main risk

The primary risk is package mismatch. Many electrically similar parts use the larger SMC package, which is not a drop-in fit for the SMB footprint.

Recommended alternatives

A functional alternative with matching electrical specs but requires a PCB layout change for its larger SMC package.

View details

Alternative comparison matrix

Feature / factor	1.5SMBJ30CA	SMCJ30CA	5.0SMDJ33CA	SM6T36CA	Compatibility / risk
Package	SMB (DO-214AA)	DO-214AB (SMC)	SMC (DO-214AB)	SMB (DO-214AA)	DO-214AB (SMC) / SMC (DO-214AB) / SMB (DO-214AA) — Larger package requires PCB layout change.; 5.0SMDJ33CA: Larger package requires PCB layout change.; SM6T36CA: Same package and footprint.
Power	1500.0W	1500.0W	5000.0W	600.0W	1500.0W / 5000.0W / 600.0W — Power ratings are identical.; 5.0SMDJ33CA: Significantly higher power rating.; SM6T36CA: Significantly lower power rating.
Voltage	30.0V	30.0V	33.0V	30.8V	30.0V / 33.0V / 30.8V — Standoff voltages are identical.; 5.0SMDJ33CA: Slightly higher standoff voltage.; SM6T36CA: Slightly higher standoff voltage, generally acceptable.
Current	31.0A	31.0A	93.9A	-	31.0A / 93.9A — Peak pulse currents are identical.; 5.0SMDJ33CA: Significantly higher peak current.
Polarity Or Type	Bidirectional	-	-	Bidirectional	Bidirectional — Both are bidirectional TVS diodes.

Application & sourcing insights

Questions & answers

SMCJ30CA is an excellent functional alternative with identical electrical ratings, but it comes in a larger SMC package and requires a PCB layout change.