NAINA Z Diodes

Z - Diodes

Z-diodes (formerly: Zener diode) are diodes that are designed to be operated perma­nently in the reverse direction in the break­down voltage range. The level of this breakdown voltage UBR is the main charac­teristic of a Zener diode and is speci­fied for the res­pective series or the indi­vidual article in the data sheet.

The diodes of the manufacturer NAINA Semiconductor consist of glass-passi­vated chips and are built in highly reliable, robust herme­tically sealed package struc­tures. They are mecha­nically strong and stable under negative environ­mental con­ditions.
These compo­nents have a very low for­ward voltage drop and a very fast switching function and thus a better efficiency. The very low forward voltage also reduces the power loss.

Use of Zener diodes

Zener diodes are used in various appli­cations such as voltage clamp applications, photo­voltaic solar systems, switching power supplies, rectifiers, detectors, motor drives, etc. We recom­mend the Z-diodes of the manufacturer NAINA, which can cover the following voltage ranges with its assortment.

  • Voltage range: 6.8V - 200V for 10W & 50W
  • Voltage range: 7.0V - 75V for 20W & 75W
  • Voltage range: 34.5V - 150V for 300W
  • Stud-base packages with UNF thread   / TO3 housing

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Dokumenttyp Hersteller Bezeichnung Datei
Datasheet NAINA Z-Diode 10W | Zener 1N2970 - 1N3015 PDF 142.2 Kb
Datasheet NAINA Z-Diode 10W | Zener 1N2970A - 1N3015A PDF 142.5 Kb
Datasheet NAINA Z-Diode 10W | Zener 1N2970B - 1N3015B PDF 142.8 Kb
Datasheet NAINA Z-Diode 300W | Zener 300Z, 301Z Series PDF 144.0 Kb
Datasheet NAINA Z-Diode 50W | Zener 1N2804B - 1N2846B PDF 480.9 Kb
Datasheet NAINA Z-Diode 50W | Zener 1N3305 - 1N3350 PDF 143.9 Kb
Datasheet NAINA Z-Diode 50W | Zener 1N3305A - 1N3350A PDF 144.1 Kb
Datasheet NAINA Z-Diode 50W | Zener 1N3305B - 1N3350B PDF 144.4 Kb
Datasheet NAINA Z-Diode 75W | Zener BZY91 Series PDF 385.3 Kb

Facts about Zener Diodes

In the past, these diodes were named after the American physicist Clarence Melvin Zener, the dis­coverer of the Zener effect (electrons tunnel through the junction). Since the 1970s, the name Z diode has been recom­mended because the Zener effect is only respon­sible for low break­down voltages. In the for­ward direction, they behave like normal diodes. In the reverse direction, Z-diodes are reverse-biased at low voltages, just like normal diodes. Above a certain reverse voltage, the so-called break­down voltage, the current increases by many orders of magni­tude within a few hundred millivolts.

NAINA Zener Diodes


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All those who have registered a trade. We supply to large customers as well as medium-sized companies, small busi­nesses and engineering offices. Schools, colleges, univer­sities and public institu­tions are also provided with technical advice and supplies. Depen­ding on the purchase quantity and product, we grant staggered prices that can vary on a daily basis. Ask us for an indivi­dual offer.

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No, you are also welcome to request an individual offer. The ordering option at is particularly suitable for smaller quantities. The WEBSHOP is to be understood as an additional service offer where you can get a quick overview of availability, delivery times and prices. Furthermore, with its filter and search function, the shop also offers a quick overview of the different variants, designs, voltages, currents. Our stock in Freiberg am Neckar (South West of Germany) is well stocked for the common types. Provided that our suppliers accept it, special solutions are also offered here. In this case, we recommend that you ask us about delivery times.

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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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