The diode is a semiconductor electronic element that is equipped with two terminals - positive and negative, and its main task is to conduct electric current. The specific thing about diodes as elements is that they conduct electric current in a p-n transition, that is, only in one direction from positive to negative charged particles. The positive electrode is called the anode and the negative electrode the cathode. When switched on in the forward direction, the resistance of the diode is small and the electric current flows, but when switched on in the opposite direction, the resistance is too high and no current flows.
Automotive diodes are semiconductor electronic elements designed for cars, caravans, buses and other mobile vehicles. Unlike standard diodes, automotive diodes are designed for limited voltage and primarily for DC voltage. Another characteristic is that they do not always contain two outputs with an anode and a cathode, but only one - a positive or negative electrode, respectively. They are intended for THT assembly by soldering.