Transistor 2N3904 NPN 200mA 40V

Description:Transistor 2N3904 NPN 200mA 40V

The 2N3904 Transistor is a general-purpose NPN bipolar junction transistor (BJT) designed for low-current, low-power amplification, and high-speed switching applications. Renowned for its reliability, fast response, and excellent gain characteristics, the 2N3904 Transistor is widely used in audio amplifiers, signal processing circuits, switching modules, and digital control systems.

With a collector current capacity of 200mA and a collector-emitter voltage of 40V, the 2N3904 Transistor provides efficient and stable performance in a broad range of low-voltage applications. It offers high DC current gain (hFE) ranging from 100 to 300, allowing it to amplify small input signals effectively while maintaining low distortion and low power loss.

The 2N3904 Transistor also features a low saturation voltage (Vce(sat)), resulting in improved efficiency during switching operations. Furthermore, it supports fast transition frequency (fT) up to 300MHz, making it ideal for high-frequency applications such as oscillators, signal modulators, and pulse amplifiers.

Manufactured using epitaxial planar technology, the 2N3904 Transistor ensures excellent thermal stability, low leakage current, and consistent performance across temperature variations. Its compact TO-92 plastic package provides easy installation and integration on PCBs, ensuring it remains one of the most commonly used and trusted transistors for educational, industrial, and hobbyist circuits alike.

Key Features:

• NPN General-Purpose Transistor: Ideal for low-current and low-power applications.

• Collector-Emitter Voltage (Vce): 40V maximum for versatile use.

• Collector Current (Ic): Up to 200mA continuous current capacity.

• High DC Gain (hFE): Typically between 100 and 300 for strong amplification.

• Fast Transition Frequency: Up to 300MHz, suitable for high-speed circuits.

• Low Noise Output: Ensures clear signal amplification in analog designs.

• Compact TO-92 Package: Lightweight, durable, and thermally efficient.

Applications:

• Audio preamplifier and tone control circuits

• Low-power switching and control systems

• Sensor signal conditioning and logic interfacing

• Pulse, oscillator, and frequency generator circuits

• LED and relay driver circuits

• Educational and prototype circuit boards

Electrical Characteristics (Typical Values):

Advantages:

• Reliable and efficient performance for low-voltage circuits.

• Fast switching capability, ideal for digital control and timing systems.

• Low noise and high gain, ensuring accurate and stable amplification.

• Thermally stable design, maintaining consistency across temperatures.

• Compact and cost-effective, perfect for high-density circuit layouts.

• Widely available and compatible, used in countless electronic designs.

Summary:

The 2N3904 Transistor is a versatile NPN BJT designed for signal amplification, switching, and high-speed applications. Capable of handling 200mA of collector current and 40V of collector-emitter voltage, it provides low power consumption, excellent gain, and fast response time.

Thanks to its epitaxial planar structure and low saturation voltage, the 2N3904 Transistor ensures stable, efficient, and long-lasting performance in both analog and digital circuits. Whether used in amplifiers, oscillators, or microcontroller interfaces, it remains one of the most dependable and widely used components in the electronics industry.