1N5408 diode

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A semiconductor rectifier comes in the form of a 1N5408 diode, featuring a cathode and anode with specific identification in its schematic representation. In this iconic symbol, the triangular shape tipped upwards is clearly indicating the location of the cathode. The actual cathode is marked with a distinctive band on the surface of the diode itself, providing easy identification as demonstrated here https://www.el-component.com/diodes/1n5408.