BC640

Single Bipolar Transistors Overview

The onsemi BC640 is a PNP silicon high current transistor housed in a TO-92 (Case 29) plastic package. It features a maximum collector-emitter voltage of -80 Vdc and a continuous collector current rating of -0.5 Adc. The device supports a total power dissipation of 625 mW at 25°C ambient temperature, with a thermal resistance junction-to-ambient of 200 °C/W. Operating characteristics include a DC current gain ranging from 25 to 250 depending on collector current, a transition frequency of 150 MHz typical, and an operating junction temperature range from -55°C to +150°C.

Single Bipolar Transistors Feature Summary

• High current capability for medium power applications
• Lead-free construction compliant with environmental standards
• Robust thermal performance with defined junction-to-case resistance

Single Bipolar Transistors Applications

• Audio amplifiers
• Video amplifiers
• General-purpose switching circuits

Single Bipolar Transistors Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package style and shipping configuration. Confirm that the procurement channel provides valid traceability for the Pb-Free designation. Ensure technical specifications align with the latest datasheet revision prior to finalizing component selection for production.

Single Bipolar Transistors Selection Notes

Select this component based on required PNP polarity and voltage ratings up to 80 V. Evaluate thermal management requirements against the specified power dissipation limits. Verify that the TO-92 package dimensions fit the intended PCB layout constraints. Consider the minimum DC current gain specifications for the target operating collector current levels.

Single Bipolar Transistors Part Context

This device belongs to the BC640 series of PNP silicon transistors designed for high current applications. It serves as a complementary counterpart to NPN devices within the same family, such as the BC635, BC637, and BC639. The series is engineered for general-purpose use in audio and video signal processing stages requiring reliable medium power handling capabilities.

Single Bipolar Transistors Replacement Considerations

BC640-016G is the standard lead-free variant of the BC640.