ECAP - polarised capacitor

Electrolytic capacitors have long been a standard in the development of electronic assemblies. The market offers a large number of manufacturers, although only a few can offer the entire technology and value chain from a single source.

Electrolytic capacitors [ECAP] are usually polarised electrochemical capacitors that achieve very high voltage values. In contrast to ultracaps, however, their capacity is many times lower. The core of an electrolytic capacitor is the anode metal, whose roughened surface is responsible for the relatively high specific capacity. For the high voltage capability, a thin oxidation layer is necessary, which acts as a dielectric.

The development of films and electrolytes form the technological heart of an ELCO manufacturer. Equally crucial is highly automated manufacturing. SAMWHA and AiSHi are two of our partners who fulfil this requirement.

We represent both brands in the D-A-CH region as distributor and representative respectively.

Buffering, storing, screening, smoothing

Typical applications of electrolytic capacitors are the screening and smoothing of rectified AC voltages and AC voltage components.

Other areas of application are:

  • Buffering and intermediate storage in DC power supplies
  • Uninterruptible power supplies
  • in the intermediate circuit of frequency converters
  • Energy storage for flash units
  • Motor starters (starting capacitor)
  • Crossovers of loudspeakers
  • Smoothing of pulse-width modulation in LEDs, etc.

Elkos with large capacitance

Today, electrolytic capacitors with large capacitance, i.e. large can type, can be found in many applications such as in electrical systems, power supplies, chargers and on printed circuit boards. The variants range from applications with high ripple current or high temperatures to requirements for a service life of 10,000 hours at 105 °C. This shows that temperatures and load scenarios play a major role for all ELKO types, especially when assessing service life.

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Dokumenttyp Hersteller Bezeichnung Datei
Datasheet SAMWHA * Conductive Polymer Hybrid E-Cap | all types: Radial Lead, SMD | Overview 06-23 - CAPCOMP range PDF 882.5 Kb
Datasheet SAMWHA * Conductive Polymer Hybrid E-Cap | YB Type, Radial Lead | Overview 06-23 - CAPCOMP range PDF 172.1 Kb
Datasheet SAMWHA * Conductive Polymer Hybrid E-Cap | YC SMD Type | Overview 06-23 - CAPCOMP range PDF 314.8 Kb
Datasheet SAMWHA * Conductive Polymer Hybrid E-Cap | YG Radial Lead | Overview 06-23 - CAPCOMP range PDF 169.2 Kb
Datasheet SAMWHA * Conductive Polymer Hybrid E-Cap | YH SMD Type | Overview 06-23 - CAPCOMP range PDF 257.0 Kb
Datasheet SAMWHA * Conductive Polymer Hybrid E-Cap | YK SMD Type | Overview 06-23 - CAPCOMP range PDF 211.8 Kb
Datasheet SAMWHA * Conductive Polymer Hybrid E-Cap | YL Type, Radial Lead | Overview 06-23 - CAPCOMP range PDF 212.4 Kb
Datasheet SAMWHA * Conductive Polymer Hybrid E-Cap | YM Type, SMD | Overview 06-23 - CAPCOMP range PDF 217.5 Kb
Datasheet SAMWHA * Conductive Polymer Hybrid E-Cap | YT Type, SMD | Overview 06-23 - CAPCOMP range PDF 199.7 Kb
Datasheet SAMWHA * Overview 06-23 | SAMWHA products in CAPCOMP range PDF 406.5 Kb
Catalogue SAMWHA Conductive Polymer Hybrid E-Cap | SAMWHA Catalogue 2023 PDF 418.5 Kb
Catalogue SAMWHA LARGE CAN AL ECaps | SAMWHA Catalgoue 2023 PDF 1.0 Mb
Catalogue SAMWHA Miniature AL ECaps | SAMWHA Catalgoue 2023 PDF 1.5 Mb
Catalogue SAMWHA SMD AL ECaps | SAMWHA Catalgoue 2023 PDF 1.4 Mb


SAMWHA Miniature Aluminum-Elcaps

Miniature Al E-Caps

Small electrolytic capacitors with radial wire connectors

  • Slim, miniaturized shape
  • Low impedance
  • Customized versiona for various markets
  • High reliability and long life (20.000hrs)
  • High ripple current at high frequency


  • Customized products for various markets: PC, note­books, smart­phones, camera, LED


Specs on request

SMT Polymer
(surface mount)


  • Size: ∅4 - ∅18
  • Voltage: 6,3V - 450V
  • Capacitance: 2,2μF - 1.000μF
  • ESR: < 10mΩ
  • Life: up to 20.000 hrs (105°C) | 5.000 hrs (130°C)


  • Automotive, PC, note­book, smart­phone, camera, LED light


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SAMWHA Hybrid Polymer / Polymer Ecaps

Hybrid Conductive Polymer


  • Excellent ripple/noise characteristics

  • Very low ESR

  • Excellent low temperature characteristics (-55 °C)

  • Elimination of short circuit risk (dielectric self recovery function)


  • Motor control, auxiliary power supply for drive video record systems, pump control, DC-DC converter, 5G repeater, vacuum cleaner (BLDC motor), TV-SMPS, medical equipment.



SAMWHA Hybrid Polymer / Polymer Ecaps

Conductive Polymer

SMT / chip type and wired type

  • Designed for top surface mounting on densely populated PCBs
  • Excellent residual ripple charac­teristics (Ripple & Noise
  • Very low ESR
  • Lifetime: 2,000 hrs at 105 °C



SAMWHA Large Aluminum-Ecaps

Large Al ECAPS

Aluminum electrolytic capacitors: High voltage

  • High reliability and long life (20,000 hrs.)
  • High voltage (600V)


  • Snap-in terminal
  • Screw Terminal Connection
    (screw/terminal connection)


  • Household appliances, LED, notebook, industrial inverters, renewable energies


Specs on request


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

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