BF421-BP

Single Bipolar Transistors Overview

The BF421-BP is a PNP silicon small-signal transistor manufactured by Micro Commercial Components. It features a maximum collector current of 50 mA and a high breakdown voltage capability of 300 V. The device is housed in a TO-92 plastic package, designated as SC-43A, with three leads. It is designed for general-purpose applications requiring reliable switching or amplification within these electrical limits.

Single Bipolar Transistors Feature Summary

• High voltage tolerance suitable for demanding circuit environments
• Compact through-hole mounting configuration
• General-purpose bipolar junction transistor functionality

Single Bipolar Transistors Applications

• General purpose switching circuits
• Small signal amplification stages
• Low power control applications

Single Bipolar Transistors Procurement Notes

Verify the specific manufacturer source when sourcing this component, as multiple vendors produce identical part numbers. Confirm RoHS compliance status and packaging type directly with the supplier. Ensure the TO-92 pinout matches your board layout requirements before finalizing procurement decisions.

Single Bipolar Transistors Selection Notes

Select this component for designs requiring a PNP transistor with a 300 V collector-emitter breakdown voltage. The 50 mA continuous current rating defines its load handling capacity. Consider the TO-92 package constraints regarding thermal dissipation and physical space availability on the printed circuit board during the selection process.

Single Bipolar Transistors Part Context

This component belongs to the family of general-purpose small-signal transistors produced by Micro Commercial Components. It serves as a standard discrete semiconductor solution for basic electronic functions. The BF421 designation identifies the specific electrical characteristics within the manufacturer's broader portfolio of bipolar devices.