2STA2121

Single Bipolar Transistors Overview

The 2STA2121 is a high-power PNP epitaxial planar bipolar transistor manufactured using BiT-LA technology. It features a collector-emitter voltage of -250 V and a continuous collector current of -17 A. The device provides a typical transition frequency of 25 MHz and total dissipation of 220 W at 25 °C case temperature. It is fully characterized at 125 °C and offers good gain linearity behavior.

Single Bipolar Transistors Feature Summary

• High breakdown voltage capability with VCEO rated at -250 V
• Complementary design to the 2STC5949 NPN transistor
• BiT-LA technology ensures good gain linearity behavior
• Fully characterized performance data at elevated temperatures up to 125 °C

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 TO-264 package dimensions match your PCB footprint requirements before procurement.

Single Bipolar Transistors Selection Notes

Select this component for applications requiring high-voltage PNP switching or linear amplification where complementary matching to the 2STC5949 is necessary. Consider the thermal resistance of 0.568 °C/W when designing heat sinking solutions. Verify that the -17 A continuous current rating meets peak load demands without exceeding safe operating area limits.

Single Bipolar Transistors Part Context

This device belongs to STMicroelectronics' high-power bipolar transistor portfolio, utilizing BiT-LA technology for linear amplifier optimization. It serves as a specific high-voltage solution within their discrete semiconductor range, designed for robust performance in demanding audio and power electronics environments.

Single Bipolar Transistors Replacement Considerations

The datasheet identifies the 2STC5949 as the complementary NPN counterpart. No other direct replacement part numbers are documented in the provided source material.

Single Bipolar Transistors FAQ

What is the maximum collector-emitter voltage?

The maximum collector-emitter voltage (VCEO) is -250 V.

Is the device suitable for high-frequency operation?

The device has a typical transition frequency (fT) of 25 MHz, which defines its high-frequency performance limits.

What packaging does the 2STA2121 use?

The device is housed in a TO-264 package.