This part is a kind of semiconductor called FSV14A001.

Function of this product has FSV14A001.

Manufacturers : ETC

Image and pinout :

Some of the text within the PDF file :

FSV14A001 FSV14A004 HV 27.1 KV FV 4.3-8.1KV SV 0-1250V HV 27.3KV FV 4.9-9.8KV SV 50-1060V [ ... ]

FSV14A001 PDF Datasheet Download