How to distinguish the anode and cathode terminals of a diode?

For two-terminal diodes, the cathode terminal is marked by a laser or other technique. For the diodes with three or more terminals, see the technical datasheet for the positions of cathode terminals.

Fig. 1 Diode Symbol
Fig. 1 Diode Symbol
Fig. 2 Example of Diode Marking
Fig. 2 Example of Diode Marking

* This is a trace of the ejector pin, which is a dimple that occurs due to manufacturing reasons. and it is not a cathode mark and has nothing to do with electrical properties.

Related Links

For products, please refer to the following links.

Diodes
Products
Basic Knowledge of Discrete Semiconductor Device Chapter II : Diodes
e-Learning
Basics of TVS Diodes (ESD protection diodes)
e-Learning
Basics of Schottky Barrier Diodes Chapter1
e-Learning

Back to FAQs of Diodes

A new window will open