First line: BU4508DX equivalent T1613MH T405-600D FAST SWITCHING THYRISTOR ST BYS21-45 Abstract: .. TYN225 ST MICROELECTRONICS BT145-500R. TYN408 ST MICROELECTRONICS BT151-500R. TYN408G ST MICROELECTRONICS BT151-500R TYN410 ST MICROELECTRONICS BT151-500R. TYN412 ST MICROELECTRONICS .. Tags: BYS21-45FAST SWITCHING THYRISTOR STT405-600DT1613MHBU4508DX equivalent18053datasheet abstract..