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Forward I-V Characteristic

Shown here is a typical forward characteristic of voltage drop depending on current. Here is a small, 500 mA Schottky with maximum reverse voltage of 30 V. Looking at diodes with a higher reverse voltage, then the forward Voltage drop will be higher. The laws of physics do not allow to make a device with small forward voltage and, at the same time, also all other parameters, that is why engineers have to select the right device depending on the application. The voltage drop is strongly negatively depending on temperature, which means it has a self-stabilizing effect. As the current flows and produces heat, the voltage drop, and the power loss will be reduced.

PTM Published on: 2021-08-25