BC640,126

Single Bipolar Transistors Overview

The BC640,126 is a PNP medium power transistor manufactured by NXP USA Inc. It operates within a TO-92 (SOT54) plastic package and serves as the complementary counterpart to the BC635, BC637, and BC639 NPN transistors. The device supports a maximum collector current of 1 A and handles a collector-emitter voltage of up to 80 V. Its thermal resistance from junction to ambient is rated at 150 K/W, with a total power dissipation capability of 0.83 W under standard conditions.

Single Bipolar Transistors Feature Summary

• High current handling capability for robust switching and amplification tasks
• Low voltage operation suitable for various electronic circuits
• Complementary pairing with specific NPN transistor series

Single Bipolar Transistors Applications

• Audio amplifiers
• Video amplifiers

Single Bipolar Transistors Procurement Notes

Verify the component datasheet status before initiating designs. Confirm that the product specifications align with the most recent documentation issued by the manufacturer. Ensure compliance with absolute maximum rating systems to prevent permanent damage during operation or testing phases.

Single Bipolar Transistors Selection Notes

Select this component when designing circuits requiring high current capabilities in a compact through-hole package. Consider its complementary relationship with other transistors in the series for balanced push-pull configurations. Evaluate thermal management requirements based on the specified junction-to-ambient resistance values.

Single Bipolar Transistors Part Context

This part belongs to a family of PNP medium power transistors designed for general-purpose applications. It shares physical dimensions and pinout configurations with related models like the BC636 and BC638, differing primarily in voltage ratings. The TO-92 package facilitates easy integration into standard printed-circuit board layouts.

Single Bipolar Transistors Replacement Considerations

Direct substitutes include the BC636 and BC638, which share identical packaging and pinning but offer different voltage ratings. Verify specific voltage requirements against the application needs before swapping these components.

Single Bipolar Transistors FAQ

What is the maximum collector-emitter voltage for the BC640?

The maximum collector-emitter voltage (VCEO) is 80 V.

Which NPN transistors are complementary to the BC640?

The BC640 is complementary to the BC635, BC637, and BC639 NPN transistors.

What is the DC current gain range at 150 mA?

The DC current gain (hFE) ranges from 100 to 250 when the collector current is -150 mA.