Transistor amplifier circuit diagram using 2 transistors

Electronics Help Care July 24, 2026 Amplifier Diagram

This is the transistor amplifier circuit diagram using 2 transistors. This amplifier can produce 100 watts output. It’s a mono audio amplifier circuit diagram. For stereo need to use a dual circuit board. We can use 20-0-20 voltage to 35-0-35 voltage. This circuit needs negative, positive, and ground voltage. We can use any PNP and NPN transistors. like 2sc5200 and 2sa1943 or c5198 and a1941.

Basic Specification for 2SC5200

Transistor Type is an NPN Power Transistor
Transistor Collector-Emitter Voltage (Vceo): 230V
Transistor Collector-Base Voltage (Vcbo): 230V
Transistor Emitter-Base Voltage (Vebo): 5V
Transistor Collector Current (Ic): 15A
The Power Dissipation (Pc): 150W
The transistor Gain (hFE): 55 – 160
Transition Frequency (fT): ~30 MHz.

Basic Specification for 2SA1943

Transistor Type is a PNP Power Transistor
Transistor Collector-Emitter Voltage (Vceo): 230V
Transistor Collector-Base Voltage (Vcbo): 230V
Transistor Emitter-Base Voltage (Vebo): 5V
Transistor Collector Current (Ic): 15A
The Power Dissipation (Pc): 150W
The transistor Gain (hFE): 55 – 160
Transition Frequency (fT): ~30 MHz.

Transistor amplifier circuit diagram board

This is an amplifier circuit diagram using a PNP transistor only. Here, we can use 6 transistors. All transistors are Positive transistors. 2SC5200 is used here. This is a mono amplifier circuit board. For dual-channel needs a dual circuit. We can use 25-0-25 voltage to 80-0-80 voltage in this circuit board. Here we are using 6 transistors; then we can use 8 amperes maximum. The output watts depend on the voltage. We know that voltage X ampere= watts. If we are using 50 volts and 8 amperes. then we can get 50×8=400 watts.