The B5819W is a Schottky Barrier Diode (SBD) ROHS manufactured by IDCHIP. It is a single 1A device with 1mA operating at 40V, and features a 900mV dropout voltage of 3A. It is a tiny surface-mount package designed for a wide range of applications, including power and voltage conversion, circuit protection, automatic temperature control, audio and video signal conditioning, and thermal management.