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2N2222A NPN Transistor
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The 2N2222A is a widely used general-purpose NPN bipolar junction transistor (BJT) in a TO-92 package. With a maximum collector current of 800 mA and a colle...
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The 2N2222A is a widely used general-purpose NPN bipolar junction transistor (BJT) in a TO-92 package. With a maximum collector current of 800 mA and a collector-emitter voltage of 75 V, it's suitable for switching and amplification in a broad range of electronic circuits.
Key Features
- NPN Bipolar Transistor – General-purpose switching and amplification
- TO-92 Package – Standard through-hole footprint
- 800 mA Collector Current – Suitable for driving relays, LEDs, and small motors
- 75 V Collector-Emitter Voltage – Handles moderate voltage applications
- High Current Gain – hFE of 100–300
Specifications
- Type – NPN BJT
- Package – TO-92
- Collector-Emitter Voltage (Vce) – 75 V
- Collector Current (Ic) – 800 mA
- Current Gain (hFE) – 100–300
- Power Dissipation – 1.8 W at 25 °C
Ideal For
- Switching circuits (relays, LEDs, motors)
- Signal amplification
- Arduino and microcontroller interfacing
- General-purpose electronic projects
Jargon buster
Plain-language definitions for the technical terms used above.
- microcontroller
- A microcontroller is a small computer on a single chip that runs a stored program and controls connected inputs and outputs such as buttons, sensors, displays and communication interfaces. In a device built around one, it is the part that executes the code and coordinates the device's behaviour.
- 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.
- through-hole
- A mounting style where the component leads pass through holes in a circuit board and are soldered on the other side. Through-hole parts are often easier to handle and solder by hand, which is useful for classroom and hobby projects.
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