What is the difference from the appearance? What is the difference between a Schottky diode and an ordinary diode logo? Schottky diode SR350 is shown in addition to the model, the shape is generally no difference, but can measure the forward voltage drop to distinguish between the direct use of digital multimeter measurement (small current) ordinary diode in 0.5V or more, Schottky diode in 0.3V The following, high current when the ordinary diode at 0.8V or so, Schottky diode 0.5V below; SR350 is that 3A50V. Another Schottky diode voltage is generally below 100V, no more than 150V.