Original IC Toshiba TO-92 2SA1943 2SC5200 are complementary power transistors commonly used in audio amplifier applications and other high-power circuits.  

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2SA1943:

-Type: NPN bipolar junction transistor (BJT)

-Maximum Collector-Emitter Voltage (Vce): Typically around 80V.

-Maximum Collector Current (Ic): About 15A.

-Gain (hFE): Typically ranges from 70 to 160.

-Package: Usually packaged in TO-220 or similar.

-Application: Used in output stages of audio amplifiers and as a driver in power circuits.

2SC5200:

-Type: PNP bipolar junction transistor (BJT)

-Maximum Collector-Emitter Voltage (Vce): Typically around 150V

-Maximum Collector Current (Ic): About 18A

-Gain (hFE): Typically ranges from 70 to 160

-Package: Usually packaged in TO-220 or similar

-Application: Similar to the 2SA1943, it is used in audio amplifiers and other high-power applications.

Usage: In audio amplifier designs, these transistors are often used in a complementary pair, with the 2SA1943 as the NPN transistor and the 2SC5200 as the PNP transistor. This pairing allows for efficient amplification of audio signals in a push-pull configuration.

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