BF423 PNP General Purpose Transistor TO-92 Plastic Case
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Prices updated: 13 Oct 2026
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About this product
The BF423 is a PNP general-purpose transistor in a TO-92 plastic package. It is used in amplifier and switching stages where a PNP device with a TO-92 footprint is needed. Confirm its voltage and current ratings in the datasheet before selecting it for a specific circuit.
Specifications
- Transistor type
- PNP
- Package
- TO-92 plastic
Frequently asked questions
What is the main use of the BF423 in a hobby circuit?
It is used as a PNP amplifier or switch in low-power circuits, such as driving a small LED, relay driver stage or signal stage. Check the collector current and voltage limits in the datasheet against your load.
Is a TO-92 BF423 suitable for high-voltage circuits?
Check the datasheet. The collector-emitter voltage rating is the key limit. Do not exceed the listed maximum voltage, and use a higher-voltage device for mains-related or high-voltage stages.
