KEMET Corporation today introduced its new high-temperature radial molded multilayer-ceramic capacitors which offer industry-leading performance in extreme environments and high temperature up to 200 degrees Celsius. These capacitors are designed specifically to withstand the severe shock and vibration conditions associated with deep-well and horizontal drilling activities, and are also well-suited for use in geophysical probes, hybrid and electric motor drives, aerospace engine compartments and defense applications. The gold-plated lead wires of these components help withstand extreme temperatures while the epoxy molded case provides environmental protection and mechanical durability.
DC voltage ratings include 50V, 100V and 200V. Capacitance offerings range from 1.0 pF up to 0.22 μF. With virtually no capacitance change at 200 degrees C and rated voltage applied, these radial molded capacitors in C0G dielectric are temperature compensating and are suited for resonant circuit applications or those where Q and stability of capacitance characteristics are required. They exhibit no change in capacitance with respect to time and voltage and boast a negligible change in capacitance with reference to ambient temperature.
“As high temperature electronic module complexity increases, the size reduction of components becomes more and more critical,” said Dr. Abhijit Gurav, KEMET Vice President of Ceramic Technology. “These new capacitors are typically smaller in size than competitor radial molded capacitors, allowing for significant downsizing and replacement opportunities. In addition, KEMET’s C0G dielectric platform is RoHS compliant, exhibits high breakdown strength, low leakage, low losses and negligible loss of capacitance as temperatures and applied voltages rise to their rated values.”
Typical applications include critical timing, tuning, circuits requiring low loss, circuits with pulse, high current, decoupling, bypass, filtering, transient voltage suppression, blocking and energy storage, circuits with a direct battery or power source connection, critical and safety relevant circuits without (integrated) current limitation and any application that is subject to extreme environments such as high shock and vibration, high temperature, high levels of board flexure and/or temperature cycling. Programs supported include downhole exploration, aerospace engine compartments, geophysical probes, hybrid and electric automotive motor drives and defense. Markets include military, industrial, aerospace, and automotive.
source: http://www.powerpulse.net/story.php?storyID=30779
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