| No | Part number | Description ( Function ) | Manufacturers | |
| 3 | C2690 | NPN Silicon Transistor DATA SHEET SILICON POWER TRANSISTOR 2SC2690,2690A NPN SILICON EPITAXIAL TRANSISTOR FOR LOW/HIGH FREQUENCY POWER AMPLIFICATION DESCRIPTION These products are general purpose transistors designed for use in audio and radio frequency power amplifiers. FEATURES • Suitable for use in driver stage of 50 to 100 W audio amplifiers and output stage of TV vertical deflection circuit. |
 NEC |
|
| 2 | C2690A | KSC2690A
|
 Samsung semiconductor |
|
| 1 | C2690A | NPN Silicon Transistor DATA SHEET SILICON POWER TRANSISTOR 2SC2690,2690A NPN SILICON EPITAXIAL TRANSISTOR FOR LOW/HIGH FREQUENCY POWER AMPLIFICATION DESCRIPTION These products are general purpose transistors designed for use in audio and radio frequency power amplifiers. FEATURES • Suitable for use in driver stage of 50 to 100 W audio amplifiers and output stage of TV vertical deflection circuit. |
NEC |
|
List of most widely used semiconductors
| Part Number | Function | Manufacturers | |
| 1N4007 | The 1N4007 is a rectification diode that is designed for high-voltage applications, typically up to 1000V. It has a maximum current rating of 1A and a forward voltage drop of around 0.7V. |
 Vishay |
|
| LM317 | This is a popular adjustable voltage regulator. |
 ON Semiconductor |
|
6N137 | LM393 | 2N3906 | 2N2222 | TIP120 | 1N5818 | LM324N | A1015 | SMAJ20CA |
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