| No | Part number | Description ( Function ) | Manufacturers | |
| 3 | PJ431 | (PJ431x) Programmable Precision References PJ431/PJ431A/PJ431B Programmable Precision References diodes in many applications such as digital voltmeters, power supplies , and op amp circuitry. The 2.5 volt reference makes it convenient to obtain a stable reference from 5.0 volt logic supplies, and since The PJ431, A, B operates as a shunt regulator, it can be used as either a positive or negative tag |
 Promax-Johnton |
|
| 2 | PJ431A | (PJ431x) Programmable Precision References PJ431/PJ431A/PJ431B Programmable Precision References diodes in many applications such as digital voltmeters, power supplies , and op amp circuitry. The 2.5 volt reference makes it convenient to obtain a stable reference from 5.0 volt logic supplies, and since The PJ431, A, B operates as a shunt regulator, it can be used as either a positive or negative tag |
Promax-Johnton |
|
| 1 | PJ431B | (PJ431x) Programmable Precision References PJ431/PJ431A/PJ431B Programmable Precision References diodes in many applications such as digital voltmeters, power supplies , and op amp circuitry. The 2.5 volt reference makes it convenient to obtain a stable reference from 5.0 volt logic supplies, and since The PJ431, A, B operates as a shunt regulator, it can be used as either a positive or negative tag |
Promax-Johnton |
|
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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