Explore TIP42C pins, signal names, electrical functions and connection guidance for each package.
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Click a lead or use the arrow keys. Front view · B1, C2, E3 · tab = C
Current-driven control junction.
Use the example’s 330 Ω base resistor and 10 kΩ base-emitter return.
The driver must sink base current. A 3.3 V output cannot directly turn off a 12 V high-side transistor.
Load terminal, also connected to the metal tab.
Connect the 100 Ω resistor load to this terminal.
The exposed tab is electrically live; insulate it when required.
Positive supply and base-drive reference.
Connect emitter to +12 V. Pull base up to emitter to turn off.
Front view: B1, C2, E3; tab is collector.
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