The 2N3906 Is 40V 200mA 625mW PNP Bipolar Transistor is designed for use in linear and switching applications. The device is housed in the TO-92 package, which is designed for medium power applications
IRF3808 75V 140A Single N-Channel HEXFET Power MOSFET in a TO-220. This Advanced Planar Stripe HEXFET ® Power MOSFET utilizes the latest processing techniques to achieve extremely low on resistance per silicon area
The DS3231SN is a low-cost, extremely accurate I²C real-time clock (RTC) with an integrated temperature-compensated crystal oscillator (TCXO) and crystal. The device incorporates a battery input, and maintains accurate timekeeping.