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Default Transistor ID HELP!

"Eddie" wrote in message
Hi guys can anyone ID this transistor?

It appears to be SK TF640m if so what is it exactly and are there
substitutes that I can get for it?

Thanks so much! has it listed. Appears to be a thyristor ?? Lots of
suitable equivalents listed

However, another place I've just seen it listed, seems to think that it is a
2SA744 transistor equivalent. A quick ohms test should at least tell you if
it *is* a PNP transistor