Part Number Replace Part Summary Case Pinout 2SB993 PNP Silicon 2SA1290, 2SB921L 2N6047 2SA663 KT818G 70V, 7A, 40W, 10MHz 2SB993 PNP Silicon 2SA1290, 2SB921L 2N6047 2SA663 KT818G 70V, 7A, 40W, 10MHz