| No | Part number | Description ( Function ) | Manufacturers | |
| 2 | U421 | N-Channel Dual JFET N-Channel Dual JFET CORPORATION U421 – U426 FEATURES DESCRIPTION The Calogic U421 Series are Dual N-Channel JFETs on a monolithic structure designed specifically for very high input impedance for differential amplification and impedance matching. This series features ultra low input bias current (250 fempto amps, U421) while offering high gain at low operating currents and t |
 Calogic LLC |
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| 1 | U421 | Low Leakage U421 HIGH INPUT IMPEDANCE MONOLITHIC DUAL N-CHANNEL JFET Linear Systems replaces discontinued Siliconix U421 The U421 is a high input impedance Monolithic Dual N-Channel JFET The U421 monolithic dual n-channel JFET is designed to provide very high input impedance for differential amplification and impedance matching. Among its many unique features, this series offers operating |
 Micross |
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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 |
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| LM317 | This is a popular adjustable voltage regulator. |
 ON Semiconductor |
|
6N137 | LM393 | 2N3906 | 2N2222 | TIP120 | 1N5818 | LM324N | A1015 | SMAJ20CA |
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