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PNP power transistor

TIP42C Basic Circuit

Build a basic TIP42C circuit with labeled pins, component values and connection guidance.

TIP42C in a circuit

The supply, driver, load and return are shown explicitly.

TIP42C B1C2E3 PNP 12V100ohm330ohmbase10kreturn load switch.
Calculated teaching example using stated 0.8 V base-emitter and 0.2 V collector-emitter magnitudes.

Connect it, step by step

Follow the component values and pin connections

Connect the load

100 Ω from collector to ground.

Drive base deliberately

330 Ω limits drive current; 10 kΩ returns base to emitter.

Check heat

Use at least a 3 W load resistor and check transistor safe operating area.

Component view