This post explains for the transistor.

The Part Number is C3679, 2SC3679.

The function of this semiconductor is 800V, 5A, NPN Transistor.

The package is TO-3P Type.

Manufacturer: Sanken electric

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Description

C3679 is 800V, 5A, Silicon NPN Triple Diffused Planar Transistor. High Voltage Switching Transistor.

Preview images :

Absolute maximum ratings ( Ta=25°C )

1. Collector to Base Voltage: Vcbo = 900 V

2. Collector to Emitter Voltage: Vceo = 800 V

3. Emitter to Base Voltage: Vebo = 7 V

4. Collector Current: Ic = 5 A

5. Collector Dissipation : Pc = 100 W ( Tc=25°C )

6. Junction Temperature: Tj = 150°C

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

Application:

1. Switching Regulator and General Purpose

 

C3679 PDF Datasheet

This post explains for the transistor.

The Part Number is C3117, 2SC3117.

The function of this semiconductor is 160V, 1.5A, NPN Transistor.

The package is TO-126, TO-220 Type

Manufacturer: Sanyo Semicon Device

Preview images :

Description

The C3117 is NPN Epitaxial Planar Silicon Transistor. 

 

Features

1. High breakdown voltage.

2. Large current capacity.

3. Adoption of MBIT process

Absolute maximum ratings ( Ta=25°C )

1. Collector to Base Voltage: Vcbo = 180 V

2. Collector to Emitter Voltage: Vceo = 160 V

3. Emitter to Base Voltage: Vebo = 6 V

4. Collector Current: Ic = 1.5 A

5. Collector Dissipation : Pc = 1 W

6. Junction Temperature: Tj = 150°C

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

Applications:

1. Color TV sound output, converters, inverters

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C3117 PDF Datasheet