2SC3944AQ

Single Bipolar Transistors Overview

The Panasonic 2SC3944AQ is a silicon NPN epitaxial planar power transistor designed for low-frequency driver and high-power amplification applications. It serves as the complementary pair to the 2SA1535/1535A series. The device features excellent collector current characteristics with a forward current transfer ratio (hFE) ranging from 65 to 330 depending on the rank, and a high transition frequency of 200 MHz. It operates within a collector-emitter voltage of 180 V and supports a continuous collector current of 1 A in a TO-220F-A1 package.

Single Bipolar Transistors Feature Summary

• Complementary pairing with 2SA1535 and 2SA1535A transistors
• High transition frequency for efficient signal processing
• Excellent forward current transfer ratio stability

Single Bipolar Transistors Applications

• Driver stage for 60 W to 100 W output amplifiers
• Low-frequency driver circuits
• High power amplification systems

Single Bipolar Transistors Procurement Notes

Verify the specific hFE rank (P, Q, R, or S) required for your design, as performance varies by bin. Confirm the component lifecycle status via official channels, as maintenance plans may affect long-term availability. Ensure thermal management aligns with the specified junction temperature limits during operation.

Single Bipolar Transistors Selection Notes

Select this component when designing audio or RF amplifier stages requiring a matched NPN/PNP pair. The TO-220F-A1 package facilitates direct heat sink mounting. Verify that the 180 V breakdown voltage meets the circuit's peak requirements and that the 1 A current rating accommodates the maximum load conditions.

Single Bipolar Transistors Part Context

This transistor belongs to the 2SC3944 family of silicon NPN power transistors manufactured by Panasonic Electronic Components. It is engineered specifically to complement the 2SA1535 series, providing balanced performance characteristics for push-pull configurations in audio and general-purpose power amplification circuits.

Single Bipolar Transistors Replacement Considerations

The 2SA1535 and 2SA1535A are the designated complementary PNP counterparts. Direct substitution requires verifying pinout compatibility and ensuring the replacement part matches the required hFE rank and thermal dissipation capabilities.

Single Bipolar Transistors FAQ

What is the transition frequency of the 2SC3944AQ?

The transition frequency (fT) is 200 MHz under standard test conditions.

How does the 'Q' suffix define this component?

The 'Q' suffix indicates a specific hFE rank classification, typically covering a forward current transfer ratio range of 90 to 155.

Is this transistor suitable for aerospace applications?

No, it is intended for standard applications such as office equipment and household appliances. Special applications like aerospace require consultation with sales staff.