The 2SA1943 is a high power PNP transistor originally from Toshiba. Due to its high current gain and collector current it is very commonly used in High power audio circuits or AF amplifiers. But now the Transistor is absolute from Toshiba and it has been replaced with TTA1943, but still the good old 2SA1943 can still be found in the market since it is still being cloned by other manufacturers in China.
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