Can someone help me identify the transistor part number in the image? I thought it might be KAY1704, but I get no matches. I get a match on KTA1704, which also lists A1704-Y as a part number. It appears that KSA1220 is a good match to KTA1704. Neither is available at Mouser or Digikey.

Any suggestions on available equivalent transistors? The transistor is used in a freezer fan control circuit.

[![enter image description here][1]][1] 


  [1]: https://i.sstatic.net/uNp5q.png