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Schottdy diode or rectifier for reverse protection?

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level6:
I need to add reverse current protection to my project and plan to add Schottky diodes/rectifier parts to do this.

Is there any difference between a Schottky diode and rectifier? I'm reading that rectifiers are for converting AC to DC and diodes for blocking reverse voltage, yet most of the examples I have found for reverse protection use Schottky rectifiers, not specifically diodes.

Some products are described as Schottky diodes and some as Schottky rectifiers. Is there really a difference?

Wimberleytech:

--- Quote from: level6 on January 31, 2020, 09:56:37 pm ---I need to add reverse current protection to my project and plan to add Schottky diodes/rectifier parts to do this.

Is there any difference between a Schottky diode and rectifier? I'm reading that rectifiers are for converting AC to DC and diodes for blocking reverse voltage, yet most of the examples I have found for reverse protection use Schottky rectifiers, not specifically diodes.

--- End quote ---

OK, the IEEE dictionary sez!
Rectifier circuit element: A circuit element bounded by two circuit terminals that has the characteristic of conducting current substantially in one direction only.  Note: The rectifier circuit element may consist of more than one semiconductor rectifier cell, rectifier diode, or rectifier stack connected in series or parallel or both, to operate as a unit.

So, rectifiers consist of one or more diodes.  The diodes can be semiconductor junction diodes or Schottky barrier diodes.  Sometimes a product advertised as a Schottky rectifier contains two Schottky diodes and three terminals.

EEs are not known for consistency and precise language.

Vovk_Z:
Diodes are used to rectifire, so TS question has no sence.

WattsThat:
Schottky diodes are sometimes used in the application instead of standard silicon rectifiers due to their lower forward voltage drop, 0.2-0.3 volts for Schottky verses 0.7 for standard 1N400x rectifiers.

GerryR:
I believe the Schottky "rectifier" would be used in a higher current application versus the Schottky diode which would be used in a signal diode application.  The rectifier version would have a slightly higher forward voltage drop, due to physical construction, but not significantly higher, and still lower than conventional silicon diodes and rectifiers.  Both are much faster in switching applications than the standard diodes, both in the forward and reverse directions.  JM $.02

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