Date: 8th May 2011
Mil/Aerospace grade ceramic-stacked capacitors
from Kemet
KEMET Corporation has added new devices to its military
and space grade ceramic-stacked capacitor product line.
These devices are now available in MIL-PRF-49470 T-level
high reliability product levels to complement KEMET's standard
reliability offerings.
"The KPS MIL Series provides our customers with high
frequency performance characteristics of ceramics in a reduced
footprint using a stacked configuration," said Craig
Scruggs, Military Product Manager for Ceramics. "As
a result, Equivalent Series Resistance (ESR) is extremely
low at higher frequencies, allowing rapid energy discharge
and excellent high frequency filtering when compared to
other capacitor solutions."
Qualified under performance specification MIL-PRF-49470,
the KPS MIL Series meets or exceeds the requirements of
Defense Supply Center, Columbus (DSCC). With low ESR and
Equivalent Series Inductance (ESL), they are ideally suited
for Switch Mode Power Supply (SMPS), pulse energy for input
and output filtering, and snubber applications.
Technical Information:
The KPS MIL Series is constructed using large chip multilayer
ceramic capacitors (MLCCs), horizontally stacked and secured
to a lead-frame termination system using a high melting
point (HMP) solder alloy. The lead-frame isolates the MLCCs
from the printed circuit board (PCB) while establishing
a parallel circuit configuration. Mechanically isolating
the capacitors from the PCB improves mechanical and thermal
stress performance, while the parallel circuit configuration
allows for bulk capacitance in the same or smaller design
footprint.
Available in BX, BR, BQ, and X7R dielectrics, these devices
are also offered in both surface mountable and through-hole
configurations.
The MIL-PRF-49470 performance specification was developed
as part of a cooperative effort between the U.S. Military,
NASA and SMPS suppliers to produce a robust replacement
for cancelled DSCC Drawing 87106.
Features and Benefits
-55°C to +125°C operating temperature range
Space Grade Reliability ("T" Level)
MIL-PRF-49470 QPL
Military Grade Case Codes 3, 4 and 5
High frequency performance and bulk capacitance in a reduced
footprint
Low ESR and ESL
High thermal stability
High ripple current capability
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