B340A-13-F by Diodes Inc. is a Schottky rectifier diode with 40V reverse test voltage, 3A max output current, and 0.5V max forward voltage. It is used for efficiency applications in electronics due to its small outline package and high operating temperature range of -55°C to 150°C.
ULN2803A by Texas Instruments is a peripheral driver with 8 functions. It has a max supply voltage of 3V and can operate in temperatures ranging from -40 to 85°C. This IC is commonly used as a buffer or inverter based peripheral driver for various applications.