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See Technical Specifications

2N3904BU +BOM

TO-92 Bipolar Transistor, NPN 0.2A 40V, 3-Pin

Manufacturer:

Onsemi
Mfr.Part #:

2N3904BU
Datasheet:

2N3904BU Datasheet (PDF)
Case Outline:

135AN
MSL Temp (°C):

0
Container Type:

BLKBG
EDA/CAD Models:

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2N3904BU General Description

The 2N3904BU is a general-purpose NPN transistor designed for small-signal amplification and switching purposes. It belongs to the 2N3904 family of transistors, which are known for their reliability and versatility. NPN transistors have three layers: the emitter, base, and collector, and they are used to amplify current or switch current flow in electronic circuits.

Key Features

NPN Configuration: The 2N3904BU is an NPN transistor, which means it amplifies current when a small current flows from the base (B) to the emitter (E), allowing a larger current to flow from the collector (C) to the emitter.
Low Power: It is designed for low-power applications and operates well at low current and voltage levels.
Amplification: This transistor is often used to amplify weak electrical signals in various electronic devices, such as audio amplifiers, signal amplifiers, and RF (radio frequency) amplifiers.
Switching: It can also be used as a switch to control the flow of current in digital and analog circuits. When properly biased, it can turn on and off other components or circuits.
High-Frequency Performance: The 2N3904BU exhibits good high-frequency performance, which makes it suitable for RF applications and high-frequency signal processing.
Compact TO-92 Package: It typically comes in a TO-92 plastic package, which is a small and common package type for transistors. This package is easy to handle and solder onto PCBs (printed circuit boards).