C4558 PDF Datasheet – 80V, 6A, NPN Transistor, 2SC4558 – Sanken

This post explains for the transistor.

The Part Number is 2SC4558.

The package is TO-220 Type

The function of this semiconductor is 80V, 6A, NPN Transistor.

Manufacturer: Sanken Electric


C4558 transistor


C4558 is 90V, 6A, Silicon NPN Triple Diffuesed Planar Transistor.

A Silicon NPN Epitaxial Planar Transistor is a type of bipolar junction transistor (BJT) made from silicon, a semiconductor material. This transistor is designed for amplifying or switching electronic signals in various electronic circuits.

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 hFE and Low Vce(sat) Transistor


Absolute maximum ratings ( Ta=25°C )

1. Collector to Base Voltage: Vcbo = 100 V

2. Collector to Emitter Voltage: Vceo = 80 V

3. Emitter to Base Voltage: Vebo = 6 V

4. Collector Current: Ic = 6A

5. Total Dissipation : Pc = 30 W

6. Junction Temperature: Tj = 150°C

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



1. Series Regulator

2. Solenoid Driver, and General Purpose.


C4558 PDF Datasheet

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