The NJM2068D/JRC2068D is a high performance, low noise dual operational amplifier. This amplifier features popular pin-out, superior noise performance, and superior total harmonic distortion.
The TIP31C is a base island technology NPN power transistor in TO-220 plastic package with better performances than the industry standard TIP31C that make this device suitable for audio, power linear and switching applications. The PNP type is TIP32C.
The 2SD400 2SD-400 D400 D-400 is a NPN Transistor 25V 1A 0.9W Triode Transistor TO-92L Package Silicon NPN Low Frequency Power Transistor. NPN Epitaxial Planar Silicon Transistor Absolute Maximum Ratings at Ta = 25’C.
The 2N-5886, 2N5886G NPN Transistor, 25A, 80V, 2-Pin TO-204AA Package Manufactured By ON Semiconductor. Features: Collector-Emitter Volt (Vceo): 80V Collector-Base
The SI4450DY, SI4450, SI-4450,4 450 is a 60V 7.5A 2.5W This N-Channel MOSFET is produced using Fairchild Semiconductor's advanced Power Trench process that has been especially tailored to minimize on-state resistance & yet maintain superior switching
The BC558 is a PNP transistor hence the collector and emitter will be closed (Forward biased) when the base pin is held at ground and will be opened (Reverse biased) when a signal is provided to base pin.