A diode is a specialized electronic component with two electrodes called the anode and the cathode. Most diodes are made with semiconductor materials such as silicon, germanium, or selenium. Some diodes are comprised of metal electrodes in a chamber evacuated or filled with a pure elemental gas at low pressure. Diodes can be used as rectifiers, signal limiters, voltage regulators, switches, signal modulators, signal mixers, signal demodulators, and oscillators.

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At Vastpoint Imtec Electronics (VIE) we have various brands that carry diodes and more specilized Schottky diodes (肖特基二極管). Brand such as Rohm, Diodes, Lite-On, PFC Devices, TIP and COS