• 2N3904 40V 200mA NPN General Purpose BJT Transistor - TO - 92 Package 10/25/50/100 Pieces - Envistia Mall
  • 2N3904 40V 200mA NPN General Purpose BJT Transistor - TO - 92 Package 10/25/50/100 Pieces - Envistia Mall
  • 2N3904 40V 200mA NPN General Purpose BJT Transistor - TO - 92 Package 10/25/50/100 Pieces - Envistia Mall
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2N3904 40V 200mA NPN General Purpose BJT Transistor - TO-92 Package 10/25/50/100 Pieces

2N3904 40V 200mA NPN General Purpose BJT Transistor - TO-92 Package 10/25/50/100 Pieces

$2.39
$2.39
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The 2N3904 is a versatile 40V, 0.2A (200mA) NPN bipolar junction transistor (BJT) designed for general-purpose switching and amplification applications. This industry-standard transistor has been a staple in electronics for decades, trusted by hobbyists, students, and professional engineers alike.

Key Features

  • High Current Gain: Typical hFE of 100-300, ensuring efficient amplification
  • Fast Switching Speed: Ideal for digital circuits and signal processing
  • Wide Operating Range: Collector-emitter voltage up to 40V
  • Maximum Collector Current: 200mA continuous
  • Low Saturation Voltage: Excellent for switching applications
  • TO-92 Package: Easy to use in breadboards and PCB designs
  • Temperature Range: -55°C to +150°C junction temperature

Technical Specifications

  • Transistor Type: NPN Bipolar Junction Transistor
  • Package: TO-92 (3-pin through-hole)
  • Collector-Emitter Voltage (VCEO): 40V
  • Collector-Base Voltage (VCBO): 60V
  • Emitter-Base Voltage (VEBO): 6V
  • Collector Current (IC): 200mA max continuous
  • Power Dissipation: 625mW at 25°C
  • DC Current Gain (hFE): 100-300 (typical at IC = 10mA)
  • Transition Frequency: 300 MHz (typical)

Common Applications

  • Amplifier Circuits: Audio preamplifiers, signal amplification
  • Switching Circuits: LED drivers, relay drivers, logic level conversion
  • Oscillators: RC and LC oscillator designs
  • Sensor Interfaces: Temperature sensors, light sensors
  • Arduino & Raspberry Pi Projects: GPIO expansion, motor control
  • Educational Projects: Learning electronics fundamentals
  • Prototyping: General-purpose development and testing

What's Included

  • 10x, 25X, 50X or 100X 2N3904 NPN Transistors in TO-92 package 

Pin Configuration (TO-92)

Looking at the flat face with leads pointing down:

  1. Emitter (E) - Left pin
  2. Base (B) - Center pin
  3. Collector (C) - Right pin

Why Choose the 2N3904?

The 2N3904 is one of the most popular and widely available transistors in the world. Its reliability, low cost, and versatile performance make it perfect for:

  • Students learning electronics
  • Makers and hobbyists building projects
  • Engineers prototyping new designs
  • Repair and replacement applications

Compatibility

Works seamlessly with:

  • Arduino, Raspberry Pi, and other microcontrollers
  • Standard breadboards and perfboards
  • PCB designs with through-hole components
  • 5V and 3.3V logic systems (with appropriate resistors)

Common Equivalents

The 2N3904 is a direct or near-direct replacement for the BC547, BC548, 2N2222A, and 2N4401. 

Quality Assurance

All transistors are sourced from reputable manufacturers and tested to meet or exceed original specifications. RoHS compliant and lead-free.

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