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FAQs

Frequently Asked Questions

A capacitor, or cap, is an electronic component that can take up, store, and discharge electrical energy. Because they can do all that quickly, capacitors are used to filter or buffer any sudden changes in a circuit's voltage, smoothing the ensuing signal

UE Catalog no longer publishes a complete printed catalog, because we want our customers to always have the most up-to-date information. Our website has the most up to date product data. Product data can be displayed and printed in different formats, such as an individual part or an entire product line (as was done in our print catalog).
Put simply. The temperature rise formula is the rms AC current( ripple) squared times the ESR of the capacitor at the operating frequency divided by a thermal constant multiplied by the surface area of the capacitor.
EIA dictates that ESR must be measured using the bridge method using a test frequency of 120 Hz or 1kHz depending on the type of capacitor so the easiest way to measure ESR is by using a LCR bridge..
There is an obligation to indicate the mark; however, since the indication is illegible on small-sized products, after negotiating with the certification authority and obtaining their agreement we do not indicate the marks on the products.