2N3905TF

Single Bipolar Transistors Overview

The Fairchild Semiconductor 2N3905TF is a small-signal PNP bipolar junction transistor (BJT) designed for general-purpose switching and amplification applications. It features a maximum collector-emitter voltage of 40 V, a continuous collector current of 200 mA, and a power dissipation rating of 625 mW. The device utilizes a TO-92 through-hole package with kinked leads. Key electrical characteristics include a minimum DC current gain (hFE) of 100 at specified test conditions and a transition frequency (fT) of 150 MHz. Operating temperatures range from -55°C to +150°C.

Single Bipolar Transistors Feature Summary

• PNP silicon epitaxial planar construction for reliable switching performance
• High current capability suitable for general-purpose amplifier circuits
• Robust thermal stability with extended operating temperature range

Single Bipolar Transistors Applications

• General-purpose signal switching
• Low-frequency amplification stages
• Driver circuits for loads requiring PNP control

Single Bipolar Transistors Procurement Notes

Verify the manufacturer marking on the component body matches Fairchild Semiconductor specifications. Confirm the presence of kinked leads in the TO-92-3 package variant. Ensure the datasheet revision aligns with the required electrical tolerances for your specific design constraints before finalizing procurement.

Single Bipolar Transistors Selection Notes

Select this component when a PNP counterpart to the NPN 2N3904 is required within the same pinout and mechanical footprint. Consider the 40V voltage limit and 200mA current capacity against load requirements. Verify that the TO-92 through-hole mounting style fits the PCB layout constraints compared to surface-mount alternatives.

Single Bipolar Transistors Part Context

The 2N3905 series represents a standard family of PNP small-signal transistors widely used in electronic designs. As part of the complementary pair to the 2N3904 NPN transistor, it allows for symmetrical circuit designs such as push-pull amplifiers and differential pairs. Fairchild Semiconductor's version adheres to established JEDEC parameters for interchangeability.

Single Bipolar Transistors Replacement Considerations

• 2N3905 (Generic)
• BC857 (Surface Mount Alternative)

Single Bipolar Transistors FAQ

What is the maximum collector-emitter voltage for the 2N3905TF?

The maximum collector-emitter voltage (VCEO) is 40 V.

Does the 2N3905TF use surface mount or through-hole packaging?

It uses a TO-92 through-hole package with kinked leads.

Is the 2N3905TF compatible with the 2N3904 pinout?

Yes, it is the PNP complement to the NPN 2N3904 and shares the same pin configuration.