BC639_D81Z

Overview

The BC639_D81Z is an NPN silicon bipolar junction transistor (BJT) manufactured by onsemi. It features a TO-92-3 through-hole package and supports a maximum DC collector current of 1 A with a collector-emitter voltage rating of 80 V. The device has a power dissipation capacity of 625 mW, a transition frequency of 200 MHz, and operates within a temperature range of -55 °C to +150 °C.

Feature Summary

• NPN silicon construction for reliable switching and amplification
• High collector current capability up to 1 A
• Wide operating temperature range suitable for industrial environments

Applications

• General-purpose switching circuits
• Amplifier stages in audio and signal processing
• Driver circuits for low-power loads

Procurement Notes

Verify the exact suffix D81Z against official onsemi documentation to confirm packaging and tape-and-reel specifications. Confirm RoHS compliance status as required by project standards. Ensure the component matches the specified TO-92-3 pinout configuration before integration into the design.

Selection Notes

Select this component for applications requiring moderate current handling and high voltage tolerance in a compact through-hole form factor. Consider the 625 mW power dissipation limit when designing thermal management solutions. Verify that the 200 MHz transition frequency meets the bandwidth requirements of the intended signal path.

Part Context

This part belongs to the BC639 series of NPN transistors from onsemi. The series is widely used in general-purpose electronics. The specific D81Z suffix indicates a particular packaging or shipping variant within the standard BC639 product line, typically associated with reel or cut-tape distribution formats.

Replacement Considerations

Consult official cross-reference guides for verified substitutes. Generic equivalents may vary in hFE gain ranges or saturation voltages. Ensure any replacement maintains the same TO-92-3 footprint and electrical ratings.