Product category:
Capacitors
News Release from: Kemet Electronics Corp | Subject: SMPS stacked capacitors
Edited by the Electronicstalk Editorial
Team on 12 February 2008
Capacitors stack up military reliability
SMPS stacked capacitors are an excellent choice for electrical applications, general purpose applications and high-frequency power supply circuits.
Kemet has developed a range of military-grade ceramic stacked capacitors for use in high-frequency power supplies Commonly referred to as switch mode power supply stacked capacitors, these devices are qualified to Military Performance Specification MIL-PRF-49470 and DSCC Drawing 87106
This article was originally published on Electronicstalk on 24 May 2004 at 8.00am (UK)
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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.
The capacitors are now available in case codes 3, 4 and 5, X7R dielectric, voltage ratings from 50 to 500V DC and capacitance values up to 47uF.
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 and +125C, and with capacitance shift limited to +/-15% 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 defence and aerospace market segment demonstrates Kemet's ongoing commitment to this market segment", says 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 Q3 2008.
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