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PNP power transistor

TIP42C Internal Circuitry

Explore the internal circuitry and functional stages of TIP42C.

Inside TIP42C

Three semiconductor regions, two junctions and one controlled current path.

TIP42C compact PNP internal structure with base collector emitter regions.
Original functional cutaway; not a die-layout reproduction.

Explore the circuit

Select a stage to see its role and connections

Base junction

The thin base controls carrier transport.

Collector region

The collector supports off-state voltage and carries load current.

Emitter region

The emitter injects carriers when the base junction is forward biased.

Component view