Ask an FAE… What’s that?

We take the top questions KEMET’s Field Application Engineers (FAEs) receive and answer them. These questions are sent in with the Ask an FAE button below and from live customer discussions.

Think you know capacitors and passive components? Don’t worry if you don’t. That’s why we create these videos.  Each episode has links to additional information. So, if you need to dig a little bit deeper or you aren’t sure what “Self-Healing” is, we can help you learn even more.

The videos for each episode are below and on the KEMET YouTube Channel.

Have a question you want to ask? No problem. Click the “Ask an FAE” button, and ask away. Even if we do not answer your question “on the air,” we will still send you answer.

Every other week, we post a new technical video. Subscribe to our YouTube channel or the KEMET Engineering Center Newsletter (bottom of the page!), and you’ll know when.

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Episode List


downloading capacitor step files

Downloading 3D Capacitor Models (STEP Files) | Ask An FAE #8

3D capacitor models and capacitor STEP files are easy to find at Dimensional data is available in our datasheets. Our website’s search provides a one-click download of part number specific STEP files.

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APEC Combined Impedance - Ask An FAE Live

Wilmer quickly shows how to combine the impedance of multiple capacitors together in K-SIM. You can even export them as a S-Parameter file.

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Comparing Ripple Voltage Differences by Capacitor Type

Comparing Ripple Voltage Differences by Capacitor Type | Ask an FAE

Different capacitor types reduce ripple voltage on DC-to-DC converters. Axel demonstrates how 4 different capacitor types affect the ripple voltage on a boost or buck regulator. Each bank of capacitors is the same capacitance. However, the ESR and ESL differences cause a different in the output ripple voltage. The capacitor types compared include X7R Ceramic, Aluminum Polymer, Polymer KO-CAP, and Tantalum MnO2.

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Tiny High Voltage Capacitor ArcShield

Tiny High Voltage Capacitor, ArcShield | Ask an FAE

Packing more capacitance at high voltage into a ceramic capacitor needs a cleverly designed electrode pattern. To prevent surface arcing, ArcShield contains a Faraday cage in a 1,000 V package as small at 0603. Mark explains to James how ArcShield achieves this performance and what it makes it different from other high-voltage ceramic surface mount capacitors.

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Derating Tantalum Capacitors - Ask FAE #3

Derate tantalum capacitors by how much? | Ask an FAE

Demystify the confusing topic of voltage derating tantalum capacitors. The rule of thumb to voltage derate 50% doesn't apply to all capacitors.

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X2 Series Capacitor Smart Meter

Picking Smart Meter Capacitors | Ask an FAE

Many power supplies use X- and Y- capacitors in their AC stage to shield against RFI, or Electro-Magnetic Interference (EMI). The most common reason we hear for using an X2 capacitor in a smart meter design is that the designer wants “a UL rating.” This episode of KEMET's Ask an FAE addresses why not all X2 capacitors are suited for smart meter series coupling designs.

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