NAINA Standard Recovery Diode SRD

SRD - Standard Recovery Diodes

Standard recovery diodes are divided into rectifier diodes and fast diodes. They are optimised for low con­duction losses and can handle very large currents.

Rectifier diodes are sub­divided into normal recovery diodes and ava­lanche diodes. Those are usually used for AC-DC conversion.


  • 35A - 60 A
  • Passivated glass plate
  • Low forward voltage drop
  • High overvoltage capability
  • Low leakage current
  • Normal and reverse polarity
  • Metric and UNF threads available

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Dokumenttyp Hersteller Bezeichnung Datei
Datasheet NAINA SRD 35A | 1N1183 - 1N1186R PDF 554.4 Kb
Datasheet NAINA SRD 35A | 1N1187 - 1N1190R PDF 550.7 Kb
Datasheet NAINA SRD 35A | 1N3765 - 1N3768R PDF 550.4 Kb
Datasheet NAINA SRD 40A | 1N1183A - 1N1186AR PDF 549.5 Kb
Datasheet NAINA SRD 40A | 1N1187A - 1N1190AR PDF 554.4 Kb
Datasheet NAINA SRD 60A | 1N2128A - 1N2131AR PDF 546.7 Kb
Datasheet NAINA SRD 60A | 1N2133A - 1N2138AR PDF 167.3 Kb

SRD Facts

The standard recovery diode (SRD) has not changed much over the years. SRDs are used in circuits that require fast voltage recovery, such as switching power supplies and rectifiers.

However, in recent years there have been some develop­ments in SRDs aimed at their per­for­mance and reliability.

  • Improving performance: The perfor­mance of SRDs has been improved through the use of new materials and manu­facturing technologies. This has led to higher operating fre­quencies, higher current densi­ties and higher voltages that can be handled by these diodes.
  • Improved reliability: By using better materials and manu­facturing processes, SRDs can be pro­duced with higher reliability. This means they last longer and are less prone to failure or damage.


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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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