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OverviewAll product unitsProduct unitPassive ComponentsProduct groupCapacitorsProduct familyAluminum Electrolytic Capacitors
OverviewAll product unitsProduct unitPassive ComponentsProduct groupCapacitorsProduct familyAluminum Electrolytic Capacitors
All subcategories More about Aluminum Electrolytic Capacitors

Würth Elektronik Capacitors

Big Portfolio available ex stock

Würth Elektronik has extended its capacitor portfolio. You will find an overview of our current technologies available ex stock in the graph. More details (e.g. series, characteristics, features, applications, etc.) about each product family can be found in the flyer or for example below. In our flyer you will also find information about our services.

Capacitor Portfolio Flyer

Available Series

Series WCAP-ATXX  

  • Mounting Style: Radial THT
  • Series: ATG8, ATG5, AT1H, ATET, ATLI, ATUL, ATLL
  • Capacitance: 0.47 – 33000 µF
  • Voltage: 10 – 450 V (DC)

Series WCAP-ASXX  

  • Mounting Style: V-Chip SMT
  • Series: ASLI, ASLL, ASLU, ASNP, AS5H
  • Capacitance: 0.47 – 6800 µF
  • Voltage: 6.3 – 450 V (DC)

Series WCAP-AIXX  

  • Mounting Style: Snap-In
  • Series: AIG8, AIE8, AIG5, AI3H
  • Capacitance: 33 – 10000 µF
  • Voltage: 63 – 450 V (DC)

Series WCAP-AWXX  

  • Mounting Style: Screw
  • Serien: AWG8, AWG5
  • Capacitance: 470 µF – 1 F
  • Voltage: 16 – 630 V (DC)

Comparison of Aluminum Capacitors

Aluminum Electrolytic Capacitors

  • Stable capacitance values at high temperature
  • High voltage ratings
  • Low leakage current

Aluminum Hybrid Polymer Capacitors

  • Low ESR
  • High ripple current characteristics
  • High stability over the temperature range
  • Low leakage current
  • High lifetime performance

Aluminum Polymer Capacitors

  • Low ESR
  • High ripple current characteristics
  • High lifetime performance

Construction

Wound Capacitor

Aluminum electrolytic capacitors are wound capacitors. These consist of aluminum foils with a layer of paper in between.
Aluminum electrolytic capacitors are wound capacitors. These consist of aluminum foils with a layer of paper in between.

Layer structure

The aluminum foil of the anode is formed by anodic oxidation before winding, so that the dielectric (oxide layer) is strengthened. The wound capacitor is completely soaked in electrolyte. This electrolyte is evenly distributed through the paper layer. In addition, the paper layer ensures a distance between the anode and cathode foil.
The aluminum foil of the anode is formed by anodic oxidation before winding, so that the dielectric (oxide layer) is strengthened. The wound capacitor is completely soaked in electrolyte. This electrolyte is evenly distributed through the paper layer. In addition, the paper layer ensures a distance between the anode and cathode foil.

Example Applications

Digital camera (THT/SMT)
Digital camera (THT/SMT)
Forklift (Snap-In/THT)
Forklift (Snap-In/THT)
Computer (THT/SMT)
Computer (THT/SMT)
Control Panel (THT/SMT)
Control Panel (THT/SMT)
Elevator (Screw)
Elevator (Screw)

Measurements

Redexpert

With the help of REDEXPERT you will find the right capacitor based on your technical requirements. The tool supports, for example, with measured values for capacitance, impedance, ESR and dissipation factor (DF). The ability to compare individual components with each other in terms of measured values enables convenient component selection.

REDEXPERT

Lifetime

Lifetime Calculator  

With this tool you can calculate your maximum expected lifetime. Depending on the product family, a different formula is used for the calculation. This calculator can be found in the aluminum capacitor module on the REDEXPERT platform.

Lifetime Calculator

Expected Lifetime vs. Temperature  

In this graph you can find the difference in expected lifetime between our different product families. The curves are based on the different formulas and the endurance of this product. The lifetime table and formula can be found in the information sheet.

Expected Lifetime Calculation of Aluminum Capacitors PDF

Webinar

Introduction to the capacitor technologies and how to use them

Capacitors make up two thirds of all electronic components and there is a huge diversity of technologies which can overwhelm young engineers. All capacitors store electrical energy in the electrical field created in a dielectric material and they are used for very diverse applications like voltage stability and filtering. How that works differs between tiny MLCCs and huge electrolytic cells, from pF ratings up to the hundreds of Farads in supercapacitors. In this presentation, we introduce different capacitor solutions taking into account the advantages and disadvantages and with a focus on the final application.

Webinar: Introduction to the capacitor technologies and how to use them

Application Notes, Documents and Videos

All Capacitors are “Audio Capacitors"  

There is an ongoing discussion within the audio engineering community about the sound quality of amplifiers concerning the audibility of signal distortions. Apparently, capacitors used for coupling and decoupling signals are suspected to be the source or at least a contributor to high-frequency distortions that influence the hearing impression.

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Application Note ANP071: Aluminum Electrolytic vs. Aluminum Polymer Capacitor and how its benefits are used properly  

Aluminum polymer capacitor is a sub-form of the electrolytic capacitors. The special feature of these capacitor types is that a conductive polymer is used instead of a liquid electrolyte. This requires a special processing step, which is carried out during production. In this chemical reaction, the so-called polymerization, by heating, the still liquid monomer that has been impregnated in place of electrolyte in the separator paper is cross-linked to a solid polymer.

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Application Note ANP109: Impedance Spectra of Different Capacitor Technologies  

Impedance and capacitance spectra are common representations of frequency dependent electrical properties of capacitors. The interpretation of such spectra provides a wide range of electrochemical, physical and technical relevant information and need to be separated from the ever-present measurement artifacts as well as parasitic effects.

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Support Note SN008: Expected Lifetime of Aluminum Electrolytic and Aluminum Polymer Capacitor  

The life cycle of a capacitor depends on many factors of the application. An important factor is the temperature or rather thermal load, as it is responsible for the fact that internal structures age over time and the electrical properties deteriorate. This results in increased leakage current, increasing the ESR, which in turn leads to a further increase of the temperature.

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Support Note SN019: Afraid of aging? The effects of time on electrolytic capacitors  

Since the development and production of electrolytic capacitors, designers have had to deal with the issues of aging and shelf life of these products. Electrolytic capacitors have been around for a very long time, but the rapid increase did not occur until the 1960s. There are still many "myths" from that time that revolve around the aging and shelf life of these capacitors.

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