MJE3055 Pinout, Equivalent, Application, Datasheet

The MJE3055 is a popular NPN power transistor used in high-current and medium-voltage applications. This article explains the MJE3055 pinout, features, specifications, working principle, and applications in the same 9-heading format.

Introduction

The MJE3055 is a robust NPN bipolar junction transistor designed for power amplification and switching tasks. It is widely used in audio amplifiers, power supplies, and motor control circuits where high current capability and reliability are required.

MJE3055 Pinout

Understanding the MJE3055 Pinout Configuration

The MJE3055 is available in a TO-220 package with the following B-C-E pin configuration:

Correct identification of the MJE3055 pinout is essential to prevent damage and ensure proper circuit operation.

MJE3055 Key Features

• NPN power transistor
• Capable of handling high collector current
• Suitable for power amplification and switching
• Good thermal stability
• Reliable performance in linear and switching applications
• TO-220 package for easy heat sink mounting

MJE3055 Characteristics / Specifications

• Collector-Emitter Voltage (VCE): 60V
• Collector-Base Voltage (VCB): 70V
• Emitter-Base Voltage (VEB): 5V
• Collector Current (IC): 10A
• Power Dissipation (PD): 75W
• Junction Temperature (Tj): 150 °C
• Storage Temperature (Tstg): −55 °C to +150 °C
• Package Type: TO-220
• Pin Configuration: Base – Collector – Emitter

More Circuit Layouts

Key Applications of MJE3055 NPN Power Transistor

• Audio power amplifiers
• Linear power supplies
• Motor driver circuits
• Power switching applications
• Voltage regulator circuits

PNP Complementary Transistor

• MJE2955 — PNP complementary transistor designed to pair with MJE3055T in push-pull or class AB amplifier configurations.

Equivalent of MJE3055 NPN Power Transistor

Equivalent Transistors:

• 2N3055
• TIP3055

Alternative Transistors:

• MJ15015
• BD249
• TIP35

(Pin configuration of some transistors mentioned above may different from MJE3055 ).

Working Principle of MJE3055

The MJE3055 operates as a current-controlled device. When a small base current is applied, it allows a much larger current to flow from collector to emitter. This makes it suitable for driving high-power loads while being controlled by low-power signals.

Frequently Asked Questions (FAQ)

Q1: Is MJE3055 the same as 2N3055?
They are similar in function, but MJE3055 comes in a TO-220 package, while 2N3055 is typically in a TO-3 package.

Q2: Can MJE3055 be used in audio amplifiers?
Yes, it is commonly used in low to medium power audio amplifier designs.

Q3: Does MJE3055 require a heat sink?
Yes, a proper heat sink is recommended, especially at high current or power dissipation levels.

Q4: What type of transistor is MJE3055?
It is an NPN bipolar junction power transistor.

Conclusion

The MJE3055 transistor is a dependable NPN power device suitable for a wide range of power electronics applications. With its clear B-C-E pinout, high current capability, and TO-220 package, it remains a popular choice for designers and hobbyists alike.

Datasheet of MJE3055 NPN Power Transistor

Click the following Button to download the datasheet of MJE3055 Transistor :

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