The C945 is an age old Japanese Bipolar audio frequency NPN transistor 60V 150mA TO-92 package. It has a decent gain value (hfe) of maximum 700 and is highly linear. Hence it was widely used in amplifier.
The MJE350 is a silicon planar PNP transistor intended for use in medium power linear and switching applications. It is mounted in TO-126. The complementary NPN type is MJE340.
The TIP35C TIP-35 35C is a NPN Power Amplifier Transistor TO-247 Package Bipolar Transistor, TIP35C is a three layer NPN device within the working range, the collector current IC is a function of the base current IB.
The BS170 is an N−Channel enhancement mode field effect transistors are produced using ON Semiconductor proprietary, high cell density, DMOS technology.
The MT8870 DTMF Audio/Speech Decoding Telephone Module is commonly used to control robots with a mobile phone, it is also used in different kinds of home automation projects where mobile dial pad input is required.
The IRFB4110PBF is a 100V single N-channel HEXFET® Power MOSFET with extremely low on-resistance per silicon area and fast switching performance using Trench MOSFET technology.