Knowles offers 10nF safety-dertified MLCCs

Syfer, a Knowles brand, has responded to demands in the automotive industry, by increasing its range of 250V AC X1/Y2 safety-certified capacitors to 10nF.

MLCCs have been used in automotive applications for many years, but the voltage rating and size of components now being used has changed dramatically. This revolution in MLCC technology, used in control electronics, is being driven by modern on-board charging systems, for example in plug-in hybrid electric vehicles (PHEVs) and electric vehicles (EVs), where mains AC is used. Syfer has responded to demands by increasing its range of 250V ac X1/Y2 safety-certified capacitors to 10nF.

The X7R dielectric capacitors are available in a 2220 case size. They offer the user the option of greater total capacitance on the board, or piece part count reduction. For example, they can take the place of 2 x 4.7nF X1/Y2 capacitors connected in parallel to reduce component count, size and weight. This leads to a significant reduction in cost. High voltage capacitor expertise means this range offers the highest capacitance / widest range available for a class X1/Y2 250Vac surface mount MLCC, says Knowles.

All Knowles safety-certified capacitors comply with international UL and TÜV (UL ongoing) specifications and offer designers the option of using a surface mount ceramic multilayer capacitor to replace leaded film types.

They also offer the benefits of simple pick-and-place assembly, reduced board space and lower profile. The MLCCs are also available in a FlexiCap version to reduce the risk of mechanical cracking. They are REACH-, RoHS- and ELV-compliant.

Now in pre-production, the 10nF, B16 parts have already been by approved by major automotive manufacturers and are under review by several others.

In addition to automotive use, applications also include AC/DC power supplies and plug-in charging systems where circuits are connected to mains supply systems and lightning strike or other voltage transients represent a threat to electronic equipment.

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