NAINA - India

Naina Semiconductor Ltd (NSL) is one of the leading manufacturers of Power Semiconductors in India. The agile company started manufacturing Standard Recovery Diodes and Fast Recovery Diodes in plastic packages and in DO-41, DO-27 and R-6 packages for Telecom applications in 1988. The quality of the components has also been convincing for Diodes with more demanding specifications, for example for applications in welding technology.

Since then, the company has continuously developed into a high-performance supplier of electrical components such as Power Diodes, Thyristors (SCR = silicon controlled rectifier), Schottky diodes (hot-carrier diodes), Z-Diodes (Zener diode), Solar Diodes, Triacs, Power Modules, Fast Recovery current rectifiers, Bridge Rectifiers, Rectifier Stacks and other Customer-specific products.

CAPCOMP is official distributor Europe and contact for individual customer requests.

NAINA in Shop

NAINA Products


Standard Recovery Diodes

Discrete Diodes

  • 6A - 400 A
  • bis 1.600 V
  • Glass Passivated Chips in Rugged, Hermetically Sealed Packages
  • Low Conduction Losses
  • High Surge Current Stability
  • Low Leakage Current
  • Metric and UNF Threads available


  • Power Supplies
  • Motor Controls
  • Consumer Electronics, Lighting
  • Telecommunications Equipment
  • Welding Equipment
  • Battery Chargers, etc.

Data Sheets

Articles in Shop



  • Diode Modules
  • Thyristor Diode Modules
  • Thyristor Modules
  • Three Phase Half Bridge Thyristor Modules
  • Three Phase Half Bridge Diode Modules
  • Schottky Diode Modules
  • Super-Fast Recovery Diode Modules

Data Sheets

NAINA Zener Diodes

Zener Diodes

Discrete Diodes

  • 10W, 20W | DO-4 Package
  • 50W, 75W | DO-5 Package
  • 300W | DO-9 Package
  • 50 W To-3 Metal Cap Diodes
  • 6,8V - 200V
  • Power Surge Compressor 300W
  • Passivated Glass Transition
  • Good Overvoltage Capability
  • Polarity: normal/reverse
  • Metric and UNF Thread Types


  • Voltage Clamping Applications
  • Photovoltaic Systems
  • Switching Power Supplies
  • Rectifiers
  • Detectors
  • Motor Drives

Data Sheets

Articles in Shop


Fast Recovery Diodes (FRD)

Discrete Diodes

  • Fast und 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 (up to 100 A)
  • Metric and UNF Threads Available


  • C-AC Converter
  • PFC Circuits
  • Switching Power Supplies

Data Sheets

Articles in Shop

NAINA Schottky Diodes

Schottky Diodes

Discrete Diodes

  • Package Types: Stud Type and Twin Tower

  • 15 - 80 A | 20V - 100V

  • Metric and UNF Threads
  • High Efficiency Due to Very Low Forward Voltage Drop and Fast Switching Action

  • Glass Passivated Chip Design

  • Very Robust Against Environmental Influences


  • Voltage Clamping Applications

  • Photovoltaic Systems

  • Switching Power Supplies

  • Rectifiers

  • Detectors

  • Motor Drives

Data Sheets

Articles in Shop

Bridge Rectifiers

Bridge Rectifier

  • Single-Phase Bridge Rectifier
  • Three-Phase Bridge Rectifier
  • Single-Phase Bridge Rectifier - half controlled
  • Three-Phase Bridge Rectifier - half controlled
  • Single-Phase Bridge Rectifier - fully controlled
  • Three-Phase Bridge Rectifier - fully controlled
  • Three-Phase Bridge Rectifier for Generators

Data Sheets

Articles in Shop


Who can place an Order with us?

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.

Do I have to order online in the shop?

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.

What can you expect from CAPCOMP?

Competitive, fair pricing and clear communication are our top priorities. We thrive on long-term customer relationships. That is why we take great care to answer your questions and concerns in a professional and impeccable manner. The quality of CAPCOMP's advice and sales performance is highly valued by our industrial customers. Your success is our success.

Where can I get current certificates from the manufacturers?

You can obtain the current certificates of the manufacturers directly on request via our info form. Due to the enormous amount and variety of product and company certificates, we do not want to make your selection unnecessarily difficult. Simply let us know which documents for which manufacturer and/or product you require. We will send you the requested documents directly.


QS/QM, Health & Safety, Certificates of Conformity, Compliance and Environmental Certificates

  • ISO 9001:2015
  • ISO 14001:2015
  • UK Conformity
  • CE Conformity
  • EU RoHS
  • SDS Safety Data
  • CRRC
  • Halogen Free
  • et al
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

Advice + Sales

Personal. Competent. Individual

Phone +49 7141 29895-0

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