2SA747A

High-power, high-frequency PNP silicon epitaxial bipolar transistor housed in a rugged metal TO-3 can, engineered for low distortion in heavy-duty audio output networks. Equivalents: 2SA747, 2SA1116, MJ15025, NTE285. Real-Life Examples: Vintage high-end audio power amplifiers (e.g., Sansui, Pioneer, Kenwood power stages), industrial heavy-duty linear power supplies, commercial public address (PA) systems.