The K34 20uA@100V 40V Single 3A 850mV@3A SOD-123FL Schottky Barrier Diodes (SBD) ROHS manufactured by GOODWORK are a type of diode that utilizes a Schottky barrier as the rectifying junction. This type of diode with its low capacitance results in a faster, more efficient, operation. It also has the added benefit of being able to withstand high reverse voltages and has a low reverse current leakage. Due to the low capacitance, these diodes do not scatter as much heat as standard diodes and operate more efficiently at high frequencies. Furthermore, they are also RoHS compliant, meaning that they are compliant with the European Union's Restriction of Hazardous Substances Directive. Finally, the manufacturer, GOODWORK, guarantees that all parts are of the highest quality and come with a warranty to ensure reliability.