MJE3055T NPN Power Transistor Datasheet

Introduction

The MJE3055T is a popular NPN silicon power transistor designed for use in audio amplifiers, voltage regulators, power supplies, and motor control circuits. It is a TO-220 packaged version of the classic 2N3055 transistor, featuring similar characteristics but in a more compact plastic package suitable for modern PCB-mounted designs. Because of its robustness and high current-handling capability, it is widely used in educational, industrial, and DIY electronic projects.

This transistor is known for its high collector current (Ic) of up to 10A, collector-emitter voltage (Vce) up to 60V, and excellent thermal stability. The MJE3055T can efficiently amplify or switch medium to high power loads, making it ideal for both linear and switching applications. It is also highly compatible with several PNP complementary transistors like MJE2955T, making it a great pair for push-pull amplifier circuits.

MJE3055T NPN Power Transistor

Engineers and hobbyists prefer the MJE3055T due to its cost-effectiveness, reliability, and ease of availability. Its design allows it to operate effectively in DC motor drivers, inverter circuits, and high-current switching systems. With proper heat sinking, the transistor can handle significant power dissipation, providing long-term stable performance in various electronic systems.

MJE3055T Pinout

Pin Configuration

Key Features

• NPN power transistor with high collector current capacity
• Ideal replacement for 2N3055 in PCB mount applications
• Excellent linear gain and current amplification
• High durability under moderate to heavy loads
• Suitable for both switching and linear amplifier circuits
• Cost-effective and widely available in the market
• Reliable thermal and electrical performance in TO-220 package

Characteristics

• Transistor Type: NPN
• Package Type: TO-220
• Collector-Emitter Voltage (Vce): 60V
• Collector-Base Voltage (Vcb): 70V
• Emitter-Base Voltage (Veb): 5V
• Collector Current (Ic): 10A (maximum)
• Power Dissipation (Ptot): 75W
• DC Current Gain (hFE): 20 – 100
• Transition Frequency (fT): 2.5 MHz
• Operating Junction Temperature: -65°C to +150°C

More Circuit Layouts

Key Applications of MJE3055T NPN Power Transistor

• Audio Power Amplifiers
• DC Motor Drivers and Controllers
• Voltage Regulators and Power Supplies
• Inverter Circuits and Converters
• Relay Drivers and Lamp Control Circuits
• Push-Pull Amplifier Stages (with MJE2955T)
• Hobby and Educational Electronic Projects

PNP Complementary Transistor

• MJE2955T — PNP complementary transistor designed to pair with MJE3055T in push-pull or class AB amplifier configurations.

Equivalent of MJE3055T NPN Power Transistor

• 2N3055 (Metal can TO-3 version)
• TIP3055
• BD249C
• MJ2955 (PNP Complement)
• 2SD1047
• 2N3442

(Pin configuration of some transistors mentioned above may different from MJE3055T).

Datasheet of MJE3055T NPN Power Transistor

Click the following Button to download the datasheet of MJE3055T Transistor :

More projects, You may like:

• Video Transmitter DIY Homemade FM Radio Transmitter
• Adjustable Power Supply DIY Battery Charger
• 12V-220V 500 Watt inverter DIY Homemade
• MPPT Solar Charge Controller DIY Homemade
• DIY LA4440 bass amplifier homemade

For more project and circuit diagrams, you can go through the Schematics in the main menu where you can find many interesting projects and circuit diagrams like audio amplifier circuits, voltage booster circuit, battery charger circuit and timer circuits etc., which are all beginner circuit projects. Feel free to check them out!

Thank you for visiting the article.