2222A

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The PN2222A is a versatile NPN bipolar junction transistor (BJT) designed for general-purpose low-power amplifying or switching applications. This transistor is widely used in hobby electronics, DIY projects, robotics, and embedded systems. With its fast switching speed and adequate current gain, it is a reliable choice for signal amplification and digital circuit control.

How It Works:
The PN2222A operates as a current-controlled switch. When a small current flows into the base terminal, it allows a larger current to flow from the collector to the emitter. This makes it ideal for controlling loads such as LEDs, motors, or relays from microcontrollers like Arduino, Raspberry Pi, and ESP32. It supports currents up to 800mA and voltages up to 40V, making it suitable for a wide range of low to medium power applications.

Specifications:

Type: NPN Bipolar Junction Transistor
Collector-Emitter Voltage (Vce): 40V
Collector Current (Ic): 800mA
Power Dissipation: 625mW
Transition Frequency: 250 MHz
Package: TO-92

Limitations:

Not suitable for high-power applications (Ic > 800mA).
Requires external resistors for proper biasing.
Heat dissipation is limited due to the TO-92 package – heatsink not applicable.

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2222A

৳5

Overview

Reviews

Detail Description

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