721 Diode

The diode is a two-terminal, uncontrollable switch, that is turned on and off by the circuit. A positive voltage across the anode and the cathode of the diode turns the device on, allowing current conduction up to its rated value. There will be a small forward voltage drop during diode conduction, as shown in Figure 7.4. The diode conducts current in one direction only and blocks voltage in the negative direction, which makes it a Quadrant II switch. The diode can block a reverse voltage to its breakdown level.

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