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Multilayer chip capacitors suitable for high voltage applications

Tue, 03/20/2012 - 9:38am
ProtectiCap processThe latest innovation in multilayer chip capacitors (mlccs) from Syfer Technology is a range of compact devices suitable for high voltage applications, supplied with a built-in protective coating. Typically, with standard high voltage capacitors, a special coating is applied after the devices are soldered onto the board in order to minimise the risk of flashover from one termination on the chip to another.

Syfer’s ProtectiCap process applied to its high voltage range of mlccs has been developed specifically to address this issue. The integral coating, a matte tin layer over the nickel FlexiCap base termination, minimises the risk of flashover and avoids the need for the customer to apply conformal coating after soldering.

Aimed at applications such as power supplies, lighting ballasts, inverters/DC link, and general high voltage circuits, the X7R dielectric ProtectiCap range of mlccs combines high voltage capability with small package size. The capacitance range of devices in this series is 100pF to 33nF, package sizes range from 1206 to 2220, and voltages available include 2KV, 2.5KV, 3KV, 4KV and 5KV.

Typical devices include a 2KV mlcc in 1206 package with capacitance range of 100pF to 3.3nF, 2KV mlcc in 2220 package with capacitance range of 220pF to 33nF, 3KV device in 1880 package with 100pF to 3.3nF capacitance range, and 5kV mlcc in 2220 package with 220pF to 4.7nF capacitance range.

Additional specifications include operational temperature range of -55 to 125oC, temperature coefficient of capacitance typically at +/-15%, and insulation resistance of 100Gohms or 1000s, whichever is the least.

This range is fully compliant with the RoHS and WEEE directives and parts are compatible with lead free solders. The devices, manufactured at Syfer’sNorwich, UK facility, are available immediately in sample packs or on standard 6 week delivery for production volumes. Pricing, on application, depends on value and volume.

For further technical and ordering information, see www.syfer.com

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