(Pack of 5) 2N3904 NPN General Purpose Transistor 40V 200mA TO-92 Package

(Pack of 5) 2N3904 NPN General Purpose Transistor 40V 200mA TO-92 Package

The 2N3904 is a versatile NPN bipolar junction transistor (BJT), widely recognized for its reliability and ease of use in a variety of low-power electronic applications. Designed for switching and signal amplification, it provides moderate current gain, low saturation voltage, and stable operation across a wide range of voltages and temperatures.

Each transistor is housed in a TO-92 plastic package, which is compact, lightweight, and PCB-friendly, making it ideal for hobbyist projects, prototyping, and educational kits. The 2N3904’s robust design ensures long-term reliability and consistent performance, even in repeated switching or amplification cycles.

With a collector-emitter voltage of 40V and a collector current of 200mA, it is suitable for low-power analog and digital circuits, including relay drivers, LED drivers, sensor interfaces, oscillators, and small-signal amplifiers. The transistor’s high transition frequency (~300 MHz) makes it capable of handling fast-switching applications, while its moderate gain (hFE: 100–300) ensures effective amplification without excessive distortion.

This pack of 5 transistors provides multiple components for various projects, ensuring convenience and value for electronics enthusiasts and professionals alike.

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Key Features

• Type: NPN General-Purpose Bipolar Junction Transistor
• Collector–Emitter Voltage (Vce): 40V
• Collector Current (Ic): 200mA
• Power Dissipation (Ptot): 625mW
• DC Current Gain (hFE): 100–300
• Transition Frequency (fT): 300 MHz typical
• Package: TO-92 Plastic – compact and easy to mount on PCB
• Reliable & Durable: Suitable for switching and amplification applications
• Low Saturation Voltage: Efficient operation in circuits
• RoHS Compliant

Applications

• Low-power switching circuits (relays, LEDs, small motors)
• Signal amplification for analog and digital circuits
• Sensor interface circuits
• Oscillator and timer circuits
• Prototyping and educational electronics projects
• General-purpose electronics applications
• Replacement in legacy circuits or hobby projects

2n3904-transistor-datasheet