Diodes
Diodes are semiconductor devices that conduct current in only one direction. This one-way behavior makes them essential for rectification, protection and regulation.
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Rectifier, Schottky, Zener, TVS and LED are the main types. Forward voltage drop (Vf), reverse voltage rating (VR), current rating and switching speed matter when selecting one. AC-DC rectification, voltage regulation, reverse-polarity and overvoltage protection are the most common uses.
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Frequently asked questions
What is the advantage of a Schottky diode?+
A Schottky diode has a low forward voltage drop (~0.3 V) and switches very fast. This makes it ideal for high-efficiency power circuits and high-frequency rectification.
What does a Zener diode do?+
A Zener diode conducts in reverse at a specific voltage and holds that voltage constant. This lets it serve as a voltage reference and in simple regulation circuits.
How do I find a diode's anode and cathode?+
The stripe on the diode body marks the cathode (−). Current flows from anode to cathode (toward the stripe); if connected in reverse, no current flows.