| No | Part number | Description ( Function ) | Manufacturers | |
| 2 | BCW60FF | NPN Silicon AF Transistors (For AF input stages and driver applications High current gain) NPN Silicon AF Transistors BCW 60 BCX 70 q q q q q For AF input stages and driver applications High current gain Low collector-emitter saturation voltage Low noise between 30 Hz and 15 kHz Complementary types: BCW 61, BCX 71 (PNP) Type BCW 60 A BCW 60 B BCW 60 C BCW 60 D BCW 60 FF BCW 60 FN BCX 70 G BCX 70 H BCX 70 J BCX 70 K Marking AAs ABs ACs ADs AFs ANs AGs AHs AJs AKs |
 Siemens Semiconductor Group |
|
| 1 | BCW60FF | NPN Silicon AF Transistors BCW60, BCX70 NPN Silicon AF Transistors For AF input stages and driver applications High current gain Low collector-emitter saturation voltage Low noise between 30 Hz and 15 kHz Complementary types: BCW61, BCX71 (PNP) 3 2 1 VPS05161 Type BCW60A BCW60B BCW60C BCW60D BCW60FF BCW60FN BCX70G BCX70H BCX70J BCX70K Marking AAs ABs ACs ADs AFs ANs AGs AHs AJs AKs 1=B 1=B |
 Infineon Technologies AG |
|
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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