2ST5949

Single Bipolar Transistors Overview

The 2ST5949 is a high-power NPN epitaxial planar bipolar transistor manufactured using BiT-LA technology. It features a collector-emitter breakdown voltage of 250 V and supports a continuous collector current of 17 A with a peak current of 34 A. The device delivers a typical transition frequency of 25 MHz and total dissipation of 250 W at 25°C case temperature. It is fully characterized at 125°C and housed in a TO-3 package.

Single Bipolar Transistors Feature Summary

• High breakdown voltage capability for robust operation
• Complementary design to the 2ST2121 PNP transistor
• BiT-LA technology ensures good gain linearity behavior

Single Bipolar Transistors Applications

• Audio power amplifiers

Single Bipolar Transistors Procurement Notes

Verify component status as the datasheet explicitly identifies this part as obsolete. Confirm availability through secondary market channels or authorized distributors holding remaining stock. Ensure the specific ordering suffix matches the required packaging configuration, as variations may exist within the product family.

Single Bipolar Transistors Selection Notes

Select this component for applications requiring high-voltage NPN switching or linear amplification where complementary PNP performance is needed. Evaluate thermal management requirements carefully due to the high power dissipation rating. Consider the transition frequency limits when designing for higher-speed signal processing tasks.

Single Bipolar Transistors Part Context

This component belongs to STMicroelectronics' discrete bipolar transistor portfolio. It utilizes BiT-LA technology optimized for linear amplifier applications. The device is designed to operate reliably across a wide temperature range, supporting demanding industrial and consumer electronics environments.

Single Bipolar Transistors Replacement Considerations

The datasheet specifies the 2ST2121 as the complementary counterpart. No other direct substitute part numbers are documented in the provided source material.