Need help IDing a TVS

[wideopenspaces]

I have a PCA with a blown TVS. The markings are: 

ST e3 G
3BA◇Y
Z521

I've seen TVS datasheets with markings starting with 3BA, but the diamond symbol is throwing me off. Can you assist?

[TDK]

Was this dug out of conformal coating or something? Looks like awful quality marking. Are you sure it's a genuine ST part?

SM30T35CAY / 3BAOY perhaps?

 

[wideopenspaces]

Yes, it was in conformal. I’m not 100% sure it’s not counterfeit. The fact that the marking has 5 characters and the data sheet shows 3BAOY, leads me to believe you’re right. The application would make me think automotive grade too. 

[Tesla DeLorean]

3BAO  SMC30J30CA

3BAQ  SMC30J36CA

https://www.st.com/en/protections-and-emi-filters/smc30j30ca.html

https://www.st.com/resource/en/datasheet/smc30j30ca.pdf