Transistor D476 NPN 4A 70V

Overview:Transistor D476 NPN 4A 70V

The Transistor D476 is a high-power NPN silicon bipolar junction transistor (BJT) specifically designed for audio amplification, voltage regulation, and high-speed switching applications. It can handle a collector current of up to 4 amperes and a collector-emitter voltage of 70 volts, making it suitable for medium-to-high power circuits that require stability and efficiency.
Moreover, the Transistor D476 is known for its fast switching performance, low saturation voltage, and high thermal reliability, which ensures smooth operation in audio systems, industrial control circuits, and power conversion units.
Consequently, it is a preferred component among engineers, technicians, and designers seeking a durable transistor with excellent current handling capabilities.

Key Features

• Transistor Type: NPN

• Collector–Emitter Voltage (V_CEO): 70 V

• Collector–Base Voltage (V_CBO): 100 V

• Emitter–Base Voltage (V_EBO): 5 V

• Collector Current (I_C): 4 A

• Power Dissipation (P_tot): 40 W

• DC Current Gain (h_FE): 40 – 250

• Transition Frequency (f_T): 8 MHz typical

• Package Type: TO-220 for efficient heat dissipation

Additionally, the Transistor D476 utilizes epitaxial planar technology that ensures low energy loss, high switching efficiency, and improved ruggedness. Its TO-220 package provides superior thermal management, making it suitable for continuous and demanding workloads.

Typical Applications

The Transistor D476 is ideal for use in:

• Audio power amplifier stages

• DC–DC converters and voltage regulators

• Switching power supplies

• Relay and solenoid drivers

• Motor control circuits

• Complementary pair designs (often with B596 PNP transistor)

Furthermore, due to its fast switching characteristics and balanced current gain, the Transistor D476 delivers precise and efficient performance in both linear amplification and switching configurations.

Electrical Characteristics (at T_a = 25 °C)

Advantages

• High current capacity (4A) and strong voltage tolerance (70V).

• Low saturation voltage for improved power efficiency.

• Fast switching response for precision control circuits.

• Excellent heat dissipation with the TO-220 package.

• Moreover, the Transistor D476 ensures thermal stability and long operational life, making it ideal for continuous and heavy-duty use.

Summary

In summary, the Transistor D476 is a robust, high-performance NPN transistor that combines power, speed, and reliability. With its 4A current handling, 70V voltage rating, and low-loss switching capability, it is a versatile choice for amplification, regulation, and switching applications.
Therefore, whether implemented in audio amplifiers, motor drivers, or industrial control systems, the Transistor D476 provides consistent, efficient, and durable operation for professional-grade electronic projects.