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A pack of 5 PN2222A NPN transistors in through-hole TO-92 packages. A versatile general-purpose transistor commonly used for switching and signal amplificati...
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A pack of 5 PN2222A NPN transistors in through-hole TO-92 packages. A versatile general-purpose transistor commonly used for switching and signal amplification in microcontroller projects — apply a small voltage to the base to control a larger current flowing from collector to emitter.
Key Features
- NPN Type – Current flows from collector to emitter when base is driven high
- General Purpose – Suitable for switching, amplification, and logic level control
- Through-Hole TO-92 – Breadboard and perfboard friendly
- 600 mA Max Collector Current – Drive relays, LEDs, motors, and other loads
Specifications
- Part Number – PN2222ARLRPG
- Type – NPN
- Package – TO-92-3 (TO-226)
- Max DC Collector Current – 600 mA
- Collector-Base Voltage (VCBO) – 75V
- Collector-Emitter Voltage (VCEO) – 40V
- Emitter-Base Voltage (VEBO) – 6V
- Gain Bandwidth Product (fT) – 300 MHz
- Collector-Emitter Saturation Voltage – 1V
- DC Current Gain (hFE min) – 35
- Max Power Dissipation – 625 mW
Package Contents
- 5× PN2222A NPN transistors (TO-92)
Ideal For
- Switching loads from microcontroller GPIO pins
- LED and relay driver circuits
- Signal amplification
- Electronics learning and prototyping
Resources
Jargon buster
Plain-language definitions for the technical terms used above.
- DC
- DC means direct current, where electricity flows in one constant direction, as supplied by batteries, USB ports and many plug-pack power supplies. When a product specifies DC, it runs from a DC supply rather than mains AC, so you need to provide the correct voltage and polarity.
- GPIO
- General-purpose input/output pins are microcontroller pins you can set in software to read signals, switch devices on and off, or connect to peripherals. The number of GPIO pins matters because it limits how many buttons, LEDs, sensors, and other parts you can wire directly to the board.
- LED
- A light-emitting diode (LED) is a small electronic component that emits light when current flows through it in the correct direction. Because it only conducts one way, its polarity matters, and a through-hole LED must be soldered the correct way around to light up.
- 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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