replacing triacs

Hello! Apologies for the slow reply, we are a newer forum and often times it can take our community a little bit to answer questions.

I would start by comparing the gate trigger currents. Often time the datasheets will tell us all of the information we need.
 
It's very unlikely that the new part would cause damage; those two TRIACs look pretty much interchangeable....I would double check though, don't take my word on it.
 
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