I am hoping someone may be able to identify the semiconductor shown in the photo. It appears to be, possibly, an optical isolated thyristor based on how it is used in the circuit. However, I am not 100% sure. I've done the SMD marking search using some of the online databases with no luck. The SMD package is not recognizable, so if anyone knows the official 'name' of the package that would be helpful.
I appreciate your opinions.
Thanks
Jim