Passives

Surface-mount varistors protect circuit components

15th November 2016
Alice Matthews
0
Datasheets

A series of seven metal-oxide varistors that complement KEMET's existing circuit protection solutions has been introduced. They can protect critical circuit components from high-energy discharges. The devices include dual-function varistor capacitors that combine transient and EMI protection, and plastic enclosed varistors for increased reliability in humid environments.

The dual-function devices integrate a capacitor to suppress interference from devices such as DC electric motors and are AEC-Q200 qualified. Compact in size, these devices are suitable for protecting sensitive automotive electronics against electric motor noise as well as potentially damaging high-energy transients. X7R-capacitor temperature characteristics ensure stable parameters over the specified temperature range.

“The dual-function varistors provide the perfect space saving solution for vehicle designs, which feature increasing numbers of electrically driven mechanisms to boost fuel efficiency as well as convenience and comfort,” said Dr. Ralf Deisenhofer, Vice President, Aluminum Electrolytic Technology.

In addition, KEMET has introduced five surface-mount varistors, including four which are AEC-Q200 qualified. This product line features devices capable of high temperature operation for use in automotive and industrial applications, as well as plastic encapsulations that offer superior humidity resistance for use in medical instruments and equipment such as outdoor mobile-communications infrastructure and professional or consumer white goods.

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