BC161 PNP General Purpose Transistor TO-92
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Prices updated: 13 Oct 2026
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About this product
The BC161 is a PNP bipolar junction transistor in a TO-92 plastic package, intended for general-purpose amplification and switching. It is commonly used in low-power circuits such as signal stages, driver stages and simple switches. A PNP device is useful for high-side switching, where the transistor sits between the positive supply and the load.
Specifications
- Type
- PNP bipolar transistor
- Package
- TO-92 plastic
- Application
- General purpose
Frequently asked questions
How is a PNP transistor used as a switch?
The load sits between the collector and ground, with the emitter connected to the positive supply. Pulling the base low, relative to the emitter, turns the transistor on and lets current flow to the load.
How do I identify the pins on the TO-92 package?
Pin order can differ between manufacturers for the same TO-92 package. Confirm the emitter, base and collector pinout in the datasheet from your specific manufacturer before wiring.
