OverviewAll product unitsProduct unitPassive ComponentsProduct groupCapacitorsProduct familyFilm CapacitorsTypeDC-Link (MKP)

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.

Let's meet our new WE-FTDB DC-Link Capacitor Series

WCAP-FTDB: Film Capacitors THT DC-Link Boxed (MKP)

A metalized polypropylene (MKP) film is used for the new product series DC-Link film capacitors. This results in the following features and characteristics:

  • High ripple current capability
  • High voltage values (up to 1200 VDC)
  • Long expected lifetime
  • High ripple current capability
  • Capacitance range: 1 µF – 75 µF
  • Operating temperature: -40 °C up to +105 °C

DC Link Application

Film capacitors, aluminum electrolytic capacitors or MLCCs can be used for the DC link application. Significant differences exist, among other things, with regard to the nominal voltage, the possible capacitance and the design/size of the capacitor. Intermediate circuit applications are e.g. frequency converters, solar inverters and DC chargers in the field of e-mobility. The diagram shows a simplified representation of a three-phase converter.

Film- vs. Aluminum Electrolytic Capacitors in Comparison

DC-Link applications can be very different – therefore different capacitor technologies can also be used. In principle, the advantages of the individual technologies must be considered and weighed up. In the table you can see the main differences between the film and aluminum electrolytic capacitors in comparison.

Inner Structure

The picture shows the internal structure of DC-Link film Capacitors. Film capacitors consist of a wound metalized plastic film. The pins are contacted on this winding and then sealed in a plastic box using epoxy resin.

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.

Webinar “DC Link Capacitors: Specifications and Applications”

In our webinar you will find more information regarding the specification and application of DC Link Capacitors. The following content is explained in more detail:

  • DC link capacitors in general
  • Applications of DC Link Capacitors
  • Comparison of Aluminum Electrolytic Capacitors and DC Link Film Capacitors using a concrete example
  • Interpretation of the datasheet values
  • Influences on the expected lifetime

Do you have specific questions about your circuit? We are happy to advise you personally. Please contact your sales representative or write us via our chat.

Webinar: DC-Link Capacitor, Specification and Application