FRD Fast Recovery Diodes

A Fast Recovery Diode (FRD) is a PN junction diode that can switch between forward and reverse oper­ation for an extremely short time. In these diodes, which also include ultra fast recovery diodes and fast recovery epitaxial diodes (FRED), there is a time-dependent corre­lation between the drop in forward voltage and reverse voltage. Different types of fast re­covery diodes cover different ranges.

The faster switching between the forward and reverse ranges, which is expressed in the switch-on and switch-off behaviour and is referred to as the reverse delay time, reduces the reverse current and the power loss of the FRD diode. These lower switching losses make PN diodes parti­cularly robust. This is a major reason for their use in switching power supplies as power diodes with up to approx. 1000V and several hundred amperes. A fast recovery diode does not differ exter­nally from a normal semi­con­ductor diode. The markings as well as the pola­rity with anode and cathode are the same for both.

Properties of FRD diodes

  • Variants: Fast & Super Fast Recovery Diodes
  • 25 - 400 A
  • Passivated glass plate (up to 70 A)
  • Low forward voltage drop
  • High overvoltage capability
  • Low leakage current
  • Normal and reverse polarity
  • Twin Tower Packages (from 100 A)
  • Metric and UNF threads available

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Dokumenttyp Hersteller Bezeichnung Datei
Datasheet NAINA FRD Diode 100A | MUR10005CT - MUR10020CTR PDF 133.2 Kb
Datasheet NAINA FRD Diode 100A | MUR10040CT - MUR10060CTR PDF 133.4 Kb
Datasheet NAINA FRD Diode 200A | MUR20005CT - MUR20020CTR PDF 133.6 Kb
Datasheet NAINA FRD Diode 200A | MUR20040CT - MUR20060CTR PDF 266.2 Kb
Datasheet NAINA FRD Diode 25A | MUR2540 - MUR2560R PDF 176.9 Kb
Datasheet NAINA FRD Diode 25A | Super Fast | MUR2505 - MUR2520R PDF 176.2 Kb
Datasheet NAINA FRD Diode 300A | MUR30005CT - MUR30020CTR PDF 133.9 Kb
Datasheet NAINA FRD Diode 300A | MUR30040CT - MUR30060CTR PDF 134.1 Kb
Datasheet NAINA FRD Diode 400A | MUR40005CT - MUR40020CTR PDF 133.7 Kb
Datasheet NAINA FRD Diode 400A | MUR40040CT - MUR40060CTR PDF 133.2 Kb
Datasheet NAINA FRD Diode 50A | MUR5040 - MUR5060R PDF 176.8 Kb
Datasheet NAINA FRD Diode 70A | MUR7005 - MUR7020R PDF 176.0 Kb
Datasheet NAINA FRD Diode 70A | MUR7040 - MUR7060R PDF 176.8 Kb


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Why are components like ultracaps called different names?

The variety of terms is explained by the English-language terms commonly used in the electronics industry, which are often mixed with German terms or used synonymously. In some cases, manufacturers have also introduced artificial terms to better distinguish themselves from competitors. Here are the most important examples:

Double layer capacitors (DSK) are referred to synonymously as:

  • EDLC (Electric Double Layer Capacitor)
  • Supercapacitors = Supercaps
  • Ultracapacitors = Ultracaps
  • Goldcap™ [Panasonic]
  • Boostcap™  [Maxwell]
  • Greencap™  [Samwha]
  • PURIXEL™  [Pureechem] for supercap cells
  • PURETRON™  [Pureechem] for supercap modules

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