2SA1943RTU

Single Bipolar Transistors Overview

The 2SA1943RTU is a PNP epitaxial silicon power transistor manufactured by onsemi. It features a TO-264AA (TO-3P) plastic package with three pins. Key electrical parameters include a collector current of 15 A to 17 A, a collector-emitter voltage of 230 V to 250 V, and a power dissipation of 150 W. The device has a gain bandwidth product of 30 MHz and an operating temperature range from -55°C to +150°C.

Single Bipolar Transistors Feature Summary

• High current capability for robust power handling
• High frequency operation suitable for RF applications
• High voltage rating for demanding circuit environments

Single Bipolar Transistors Applications

• Audio power amplification systems
• General-purpose power switching circuits
• Motor control applications

Single Bipolar Transistors Procurement Notes

Verify the manufacturer designation carefully, as onsemi acquired Fairchild Semiconductor assets. Confirm the specific suffix (RTU) matches the required tape-and-reel packaging variant if applicable, or ensure the tube variant aligns with assembly requirements. Cross-reference datasheet revisions to ensure parameter consistency.

Single Bipolar Transistors Selection Notes

Select this component for high-power PNP applications requiring significant current handling and voltage tolerance. Consider the thermal resistance of the TO-264 package and ensure adequate heatsinking for 150 W dissipation. Verify that the 30 MHz bandwidth meets the signal frequency requirements of the target design.

Single Bipolar Transistors Part Context

This transistor belongs to the family of high-power bipolar junction transistors used in audio and industrial electronics. It is often paired with complementary NPN devices like the 2SC5200 for push-pull amplifier configurations. The part represents a standard solution for medium-to-high power linear and switching applications.

Single Bipolar Transistors Replacement Considerations

Public confirmed substitutes include the FJL4215 and the generic equivalent 2SA1943N. Ensure replacement parts match the TO-264/TO-3P pinout and electrical ratings. Verify that any alternative maintains the same PNP polarity and silicon epitaxial construction.