Identify S447 T0220 component
I've been searching the part for a while and searching up the logo, it's by Teccor Electronics which is now owned by Littelfuse. However searching up the catalog, I can't seem to find anything that fits the 3 number naming scheme. However that S in the front most certainly means that part is a SCR. This is all I got. It's probably a very old part. Perhaps talk to Littelfuse support.