The MPF102 JFET is a popular N-Channel JFET that is commonly used in low power amplifier circuits. The JFET is no longer in production and finding it might be difficult. So they are not recommended for new designs.
The MPSA13 is an NPN Darlington Transistor with a high DC Gain of 5000 and a high Transition Frequency of 125MHz making it suitable for amplifier designs.
The MPSA06 is an 80V 500mA general purpose NPN transistor with a maximum gain value of 100. This makes the transistor suitable for amplifier applications.
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The MPSA18 is a General Purpose NPN Transistor which can operate with low noise and high gain. The transistor has a gain value of 500 to 1500 and can operate at a voltage of 45V with 200mA load current.
The KST42 is a SMD package NPN Transistor that has high collector emitter voltage of 300V and a collector current of 500mA. The transistor is a general purpose transistor and can be used for both switching and amplification purpose.
The NTE123AP is a NPN Transistor with collector current of 600mA and Base voltage of 6V. It has a gain value of 100 to 300 and hence can be used in low power audio circuits.
The 2N3771 is a high current switching transistor that has a collector current of 30A. It is commonly used in Linear switching devices and power supply circuits.
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The NTE159M is a general purpose PNP transistor with a maximum gain of 300 and collector current of 600mA. It has a low collector saturation voltage of 1V and can be used in switching and amplifier circuits.
The 2SC2879 is a 45V 25A NPN Transistor that is commonly used for linear power amplifier applications. It is designed to operate between 2-30 MHz at a voltage of 12.5V.
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