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News

KEMET - New military-grade ceramic stacked capacitors


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KEMET
: 13 February, 2008  (New Product)
KEMET has introduced military-grade ceramic stacked capacitors for use in high- frequency power supplies. The product is commonly referred to as Switch Mode Power Supply Stacked Capacitors, or SMPS Stacked Capacitors.
The product line is qualified to Military Performance Specification MIL-PRF-49470 and DSCC Drawing 87106. The SMPS Stacked Capacitors are intended for high-reliability SMPS and pulse energy applications. Their low Equivalent Series Resistance (ESR) and Equivalent Series Inductance (ESL) make them ideally suited for input and output filtering of power supply applications as well as snubber applications.


These capacitors are now available in case codes 3, 4, and 5, X7R dielectric, voltage ratings from 50 VDC up to 500 VDC, and capacitance values up to 47 uF. The chip stack is horizontal and the leadframe attachment is a high-temperature solder. They are also available in unencapsulated (unpotted bare chips) or encapsulated (potted assembly) styles. The encapsulated styles are primarily used for applications where increased mechanical and environmental protection is required, such as in Avionics systems. The Military performance specification MIL-PRF-49470 is used to establish a baseline part for high-reliability applications.


With an operating temperature range between -55 degrees C and +125 degrees C, and with capacitance shift limited to +/-15 percent over that range, these SMPS Stacked Capacitors are an excellent choice for electrical applications, general purpose applications and high-frequency power supply circuits.


'Another new product introduction focused on the Defense and Aerospace market segment demonstrates KEMET's ongoing commitment to this market segment,' stated KEMET Product Line Manager for Specialty Products Travis Ashburn. 'As we strive to become The Capacitance Company, we continue to build on our decades of experience in the military and high-reliability segments to develop new products to service this key market.'


Price ranges for these new products will depend on quantity, capacitance, voltage, case size, and tolerance. Larger case codes 1, 2, and 6 will be available for order in the third quarter of Calendar Year 2008. Contact KEMET for additional details or visit www.kemet.com for complete specifications and performance characteristics
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