BC638-AP

Single Bipolar Transistors Overview

The BC638-AP is a PNP silicon small-signal bipolar junction transistor manufactured by Micro Commercial Components. It utilizes a TO-92 plastic encapsulated package designed for through-hole mounting. The device supports a maximum continuous collector current of 500 mA and withstands a collector-emitter voltage of 60 V. Key electrical characteristics include a DC current gain (hFE) ranging from 40 to 160, a transition frequency of 150 MHz, and a power dissipation rating of 625 mW. It operates within a temperature range of -55°C to +150°C.

Single Bipolar Transistors Feature Summary

• PNP polarity configuration suitable for general-purpose amplification and switching applications
• High current capability with 500 mA collector current rating
• Robust voltage handling with 60 V collector-emitter breakdown
• Wide operating temperature range extending to +150°C

Single Bipolar Transistors Applications

• General-purpose signal amplification circuits
• Low-power switching applications
• Audio pre-amplifier stages

Single Bipolar Transistors Procurement Notes

Verify the specific suffix designation against official Micro Commercial Components documentation to confirm RoHS compliance status and exact binning specifications. Ensure the ordering part number matches the required hFE gain range and package variant. Confirm availability as distribution status may vary by region.

Single Bipolar Transistors Selection Notes

Select this component when a PNP transistor with moderate current handling and high voltage tolerance is required in a compact through-hole package. Compare the 625 mW power dissipation limit against thermal requirements. Verify that the 150 MHz transition frequency meets the signal bandwidth needs of the target circuit design.

Single Bipolar Transistors Part Context

This component belongs to the BC638 series of NPN/PNP complementary transistors widely used in consumer electronics. The BC638 variant specifically provides the PNP counterpart to the BC637 NPN transistor. It is commonly paired in push-pull output stages and differential amplifier configurations within analog signal processing systems.

Single Bipolar Transistors Replacement Considerations

Direct substitutes include the BC638B or BC638C variants which share identical pinouts and electrical ratings but differ in gain binning. Other compatible replacements must match the TO-92 package, PNP polarity, and minimum 60V VCEO specification.