2N3055 NPN Transistor - Datasheet

Introduction

The 2N3055 is a highly durable and widely recognized NPN power transistor known for its robust performance in high-current and high-power applications. Manufactured with a TO-3 metal can package, this device offers exceptional thermal dissipation, making it suitable for demanding environments. Its key electrical specifications include a high collector-emitter voltage (VCEO) of 60V and a continuous collector current (IC) of 15A. These characteristics, combined with a power dissipation rating of 115W, cement its status as a workhorse in various electronic circuits.

The 2N3055 is commonly employed in power supply regulation, audio power amplifiers, and high-current switching circuits. It’s a classic component in linear power supplies, where it acts as the series pass element to regulate voltage. Its high power handling capability makes it an ideal choice for the output stage of audio amplifiers, providing a reliable and powerful output. Additionally, the transistor’s robust nature allows it to be used in DC-to-DC converters and as a motor driver, showcasing its versatility beyond just power supply applications.

While newer transistors with better efficiency and smaller form factors have emerged, the 2N3055 remains a favorite among hobbyists and engineers due to its reliability and proven performance. Its widespread availability and simple, rugged design have made it a staple in educational electronics and repair shops worldwide. The 2N3055‘s legacy continues to be a testament to its enduring utility in a wide array of power electronics applications.

2N3055 NPN Transistor Pinout

While the pinout for the 2N3055 transistor may appear unclear at first glance due to the lack of distinct markings, you can easily identify the base terminal. The key is to observe the relative position of the leads; the base is the lead positioned closest to the mounting hole. This unique physical alignment serves as a reliable guide for correct terminal identification

2N3055 NPN Transistor Specifications

Characterstics	Rating (Max)
Collector-Base Voltage(V_CBO)	100 V
Collector-Emitter Voltage(V_CEO)	60 V
Emitter-Base Voltage(V_EBO)	7 V
Continuous Collector Current(I_C)	15 A
Continuous Base Current(I_B)	7 A
DC Current Gain(h_FE)	120(Max)
Collector Power Dissipation(P_C)	115 W
Storage Temperature(T_STG)	-65 °C ~ 200 °C

2N3055 Specifications Table

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Key Applications of the 2N3055 Transistor

Following are the key applications of this power transistor:

As a switching transistor in medium power applications.
Used in some old television models.
Audio power amplifiers. Typically configured in a push-pull configuration delivering up to 40 Watts into an 8 a speaker(load).
Sometimes used in regulator circuits
Series pass transistor in linear power supplies.
Signal Amplifiers

Equivalent transistors

Transistors that are exactly similar or equivalent to 2N3055 and can be replaced with the following:

2N6673
2N6675
2N5039
2N5671
2N5881
2N3055A
2N3055G
2N3055HV
2N3055AG

Datasheet of 2N3055 NPN Transistor

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