This post explains for the NPN Transistor.

The Part Number is Q2N2222.

The function of this semiconductor is 40V, 600mA, Transistor.

The pakcage is TO-92 type (TO-226).

Manufacturer: ETC

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Description

Q2N2222 is NPN Silicon Amplifier Transistor. This transistor  is a commonly used NPN bipolar junction transistor (BJT) in electronic circuits. It is a small-signal transistor with versatile applications and is widely available in the electronics industry.

 

Absolute maximum ratings ( Ta=25°C )

1. Collector to Base Voltage: Vcbo = 75 V

2. Collector to Emitter Voltage: Vceo = 40 V

3. Emitter to Base Voltage: Vebo = 6 V

4. Collector Current: Ic = 600 mA

5. Collector Dissipation : Pc = 625 mW

6. Junction Temperature: Tj = 150°C

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

 

 

Q2N2222 PDF Datasheet

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• General-Purpose Operational Amplifier

Part Number: C4793, 2SC4793

Function: Silicon NPN Transistor ( 230V, 1A )

Package: TO-220 type

Manufacturer: Toshiba Semiconductor

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Description

C4793 is Silicon NPN Epitaxial Type Transistor. 

Features

• High transition frequency: fT = 100 MHz (typ.)

• Complementary to 2SA1837

 

Absolute maximum ratings ( Ta=25°C )

1. Collector to Base Voltage: Vcbo = 230 V

2. Collector to Emitter Voltage: Vceo = 230 V

3. Emitter to Base Voltage: Vebo = 5 V

4. Collector Current: Ic = 1 A

5. Collector Dissipation : Pc = 2 W

6. Junction Temperature: Tj = 150°C

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

Applications:

1. Power Amplifier

2. Driver Stage Amplifier

C4793 PDF Datasheet