Whisker test report

Due to the legislation in the EU, electronic components for certain applications may not contain lead (Pb) after 1st of July 2006. In order to meet the requirements, Evox Rifa has already changed the coating on the connection wires and, for paper capacitors also the end-spraying alloy. In this report we have used the testing requirements of one customer and it should be sufficient to show that the whisker formation is within the limits.

A capacitor application guide for electronic power steering, pumps and compressors, and more.

Tips on reducing capacitor footprint and total cost when designing SMPS.

Describes the different X and Y capacitor technologies. Includes a handy selector chart.

A quick aid to the designer showing which SMD capacitor dielectrics are best depending on the required characteristics, plus some additional points to consider before making the final selection.

Metallized polyester film capacitors with DIL construction are suitable for high frequence filtering, DC-DC converters and high frequency SMPS. A serie of two articles.

Part 2, Acrobat format
(1M)

Presented in CARTS-Europe 2004, October 2004, Nice, France

A short summary of the differences between Evox Rifa's naked and encapsulated SMD capacitors.

Download and unzip the file, includes instructions. Supports all DIL capacitors and the wound SMD film capacitors, both encapsulated and naked.

Zipped file
(741K)

Another good resource is DSL Reports including a glossary.

Certificates are now available online.

A description of the safety agency requirements governing the use of RFI suppression capacitors and their impact on capacitor selection.

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Discusses the different designs used to manufacture film and impregnated paper X and Y capacitors.

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Answers the following questions:

• Why are the agency marks missing from RFI capacitors with agency approvals?
• Why are there two rated voltages on some capacitors?
• My high-line voltage is 263VAC but Evox Rifa recommended a capacitor approved at 250VAC. Is this correct?

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NPO ceramics are commonly used to set the basic timing of an SMPS. However Evox series PFR5 can offer a cost effective alternative.

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In applications where a capacitor is subjected to either steep pulses or high frequency AC currents the proposed capacitor must be carefully evaluated. This tech note explains how for Evox Rifa polypropylene capacitors.

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Link to an article originally appearing in the March 2001 issue of PCIM magazine. Note: For Evox Rifa capacitors much of the thermal analysis described in the article has been done for the engineer. Just download the PCCad software or consult the thermal data in the Evox Rifa Film Capacitor Catalog.

Link

Covers cooling issues, EMI and safety. Reprinted from Machine Design, Aug. 9, 1990. Click here if you wish to read a synopsis before downloading.