250W Power Amplifier Circuit Diagram using 2SC3856 & 2SA1492

Introduction

Power amplifiers are essential components in electronic devices that require high-quality audio output. One popular choice for a 250W power amplifier circuit diagram is using 2SC3856 and 2SA1492 transistors in the output section, MJE340 and MJE350 transistors in the driver section, and BC546 transistor in the preamplifier section. In this article, we will discuss the circuit diagram of this 250W power amplifier and the specifications of each component used.

Specification of Transistors:

1. 2SC3856: The 2SC3858 is a high-power, NPN bipolar junction transistor commonly used in audio amplifier applications. Its maximum collector current is 8A, and it has a power dissipation of 125W. The transistor exhibits low saturation voltage and excellent linearity, making it suitable for high-power amplification.
   
2. 2SA1494: The 2SA1494 is a complementary PNP transistor that complements the 2SC3858. It shares similar specifications, such as a maximum collector current of 12A and a power dissipation of 150W. The 2SA1494 transistor also features low saturation voltage and excellent linearity.
   
3. MJE350: The MJE350 is a high-voltage, NPN transistor commonly used in driver stages of audio amplifiers. It has a maximum collector current of 0.5A and a power dissipation of 1.25W. The MJE350 transistor offers high gain and excellent switching characteristics.
   
4. MJE340: The MJE340 is a complementary PNP transistor that complements the MJE350. It shares similar specifications, including a maximum collector current of 0.5A and a power dissipation of 1.25W. The MJE340 transistor exhibits high gain and excellent switching characteristics.
   
5. BC546: The BC546 is a general-purpose NPN transistor that is commonly used in low-power amplifier and switching applications. It has a maximum collector current of 0.1A and a power dissipation of 0.5W. The BC546 transistor offers low noise characteristics and excellent voltage gain.

250W Amplifier Circuit Diagram 2SC3856 2SA1492

This project can be built using a few basic components. The circuit diagram of this project is shown below.

Caution: Website contains information on high voltage circuits. Proceed at your own risk, ensuring proper knowledge and precautionary measures to prevent electric shock or injury.

More Circuit Layouts

Components List of 250W Amplifier Circuit Diagram 2SC3856 2SA1492

Following is the list of all components used in this project:

• 2SC3856 Transistor x 3
• 2SA1492 Transistor x 3
• MJE340 Transistor x 1
• MJE350 Transistor x 2
• BC546 Transistor x 3
• 1N4004 Diode x 2
• 1Ω Resister x 2
• 0.1Ω Resister x 4
• 10Ω Resister x 1
• 2.2k Resister x 2
• 22k Resister x 3
• 560Ω Resister x 3
• 1k Resister x 1
• 3.3k Resister x 2
• 220Ω Resister x 2
• 4.7uF Capacitor x 1
• 100uF Capacitor x 4
• 100nF Capacitor x 2
• 220pF Capacitor x 1
• 100pF Capacitor x 2
• LED Light x 1
• ±50V Power Supply
• 4Ω Speaker

Explanation of 250W Amplifier Circuit Diagram 2SC3856 2SA1492

The 250W power amplifier circuit diagram using 2SC3856 and 2SA1492 transistors in the output section is designed to deliver high power output while maintaining low distortion. The MJE340 and MJE350 transistors in the driver section help to amplify the signal from the preamplifier section, which is powered by the BC546 transistor. This circuit design ensures a clean and powerful audio output for various applications, such as home audio systems or PA systems.

Conclusion

The 250W power amplifier circuit diagram using 2SC3856, 2SA1492, MJE340, MJE350, and BC546 transistors is an effective and reliable choice for electronic devices requiring high-quality audio output. With a careful design and selection of components, this circuit can deliver clean and powerful sound for various applications. By understanding the circuit diagram and specifications of each component, individuals can confidently build and utilize this power amplifier for their audio needs.

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