C2166 PDF – 75V, 4A, NPN, Equivalent, 2SC2166 Transistor

Part Number: C2166, 2SC2166

Function: 75V, 4A, Silicon NPN Power Transistor

Package: TO-220 Type

Manufacturer: Mitsubishi Electric Semiconductor


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C2166 image


The C2166 is a silicon NPN epitaxial planar type transistor designed for RF power amplifiers in HF band mobile radio applications.

A NPN transistor is a type of bipolar junction transistor (BJT) that consists of two n-type semiconductor materials separated by a single p-type material.

The NPN transistor is used to amplify or switch electronic signals and is widely used in many electronic circuits. It works by controlling the current flow between the collector and emitter terminals through the base terminal.

NPN Configuration:

1. Emitter (N): The heavily doped N-type layer, which is the source of charge carriers (electrons) in the transistor.

2. Base (P): The thin P-type layer, which controls the flow of charge carriers between the emitter and collector.

3. Collector (N): The N-type layer, which collects the charge carriers that pass through the base-emitter junction.

Silicon NPN Epitaxial Planar Transistors are fundamental components in electronic circuits, playing a crucial role in amplification, signal processing, and digital logic. They are widely used in a vast array of electronic devices, including radios, amplifiers, computer processors, and many other applications where signal control and amplification are essential.


1. High power gain : Gpe ≥ 13.8 dB

2. Emitter ballasted construction for high reliability and good performances.

3. TO-220 similar package is combinient for mounting


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Absolute maximum ratings ( Ta=25°C )

1. Collector to Base Voltage: Vcbo = 75 V

2. Collector to Emitter Voltage: Vceo = 75 V

3. Emitter to Base Voltage: Vebo = 5 V

4. Collector Current: Ic = 4 A

5. Collector Dissipation : Pc = 1.5 W

6. Junction Temperature: Tj = 150°C

7. Storage Temperature: Tsg = -55 ~ +150°C



1. 3 to 4 watts output power amplifiers in HF band mobile radio applications.

C2166 PDF Datasheet