Little Bird
2N3904 NPN Transistor
$0.94
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The 2N3904 is a popular general-purpose NPN bipolar junction transistor (BJT) in a TO-92 package. With a maximum collector current of 200 mA and a collector-...
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The 2N3904 is a popular general-purpose NPN bipolar junction transistor (BJT) in a TO-92 package. With a maximum collector current of 200 mA and a collector-emitter voltage of 60 V, it's one of the most commonly used small-signal transistors for switching and amplification.
Key Features
- NPN Bipolar Transistor – General-purpose switching and amplification
- TO-92 Package – Standard through-hole footprint
- 200 mA Collector Current – Suitable for small-signal switching
- 60 V Collector-Emitter Voltage – Handles moderate voltage applications
- Low Power Dissipation – 625 mW at 25 °C
Specifications
- Type – NPN BJT
- Package – TO-92
- Collector-Emitter Voltage (Vce) – 60 V
- Collector Current (Ic) – 200 mA
- Current Gain (hFE) – 70 minimum
- Power Dissipation – 625 mW at 25 °C
Ideal For
- Small-signal switching circuits
- Signal amplification
- Arduino and microcontroller interfacing
- Beginner electronics projects and learning
Jargon buster
Plain-language definitions for the technical terms used above.
- microcontroller
- A microcontroller is a small computer on a chip that runs your program and controls connected inputs and outputs. For this product, it is the part that reads buttons and sensors, drives the display and speaker, and communicates over Bluetooth.
- Power dissipation
- Power dissipation is electrical energy being turned into heat inside a component. It matters because too much heat can reduce efficiency, affect reliability, or require a larger component or better cooling.
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