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Tantalum Surface Mount Capacitors – Standard Tantalum
T491 Industrial Grade MnO 2 Series
Capacitor Marking
C, D, X Case Sizes
KEMET
Industrial
Grade
MnO 2
Polarity
Indicator (+)
KEMET
Industrial
Grade
MnO 2
Polarity
Indicator (+)
Rated
Voltage
226
35 K
230
Picofarad Code
KEMET ID
Date
Code*
Rated
Voltage
Date
Code*
C6
49
KEMET ID
Picofarad Code
Internal
Code
* 230 = 30 th week of 2012
Date Code *
Date Code*
1 st digit = Last number of Year
2 nd and 3 rd digit = Week of the Year
9 = 2009
0 = 2010
1 = 2011
2 = 2012
3 = 2013
4 = 2014
01 = 1 st week of the Year to
52 = 52 nd week of the Year
Year
X = 2009
A = 2010
B = 2011
C = 2012
D = 2013
E = 2014
1 = Jan
2 = Feb
3 = Mar
4 = Apr
5 = May
6 = Jun
Month
7 = Jul
8 = Aug
9 = Sept
O = Oct
N = Nov
D = Dec
Storage
Tantalum chip capacitors should be stored in normal working environments. While the chips themselves are quite robust in other
environments, solderability will be degraded by exposure to high temperatures, high humidity, corrosive atmospheres, and long term
storage. In addition, packaging materials will be degraded by high temperature– reels may soften or warp and tape peel force may
increase. KEMET recommends that maximum storage temperature not exceed 40oC and maximum storage humidity not exceed 60%
relative humidity. Temperature fluctuations should be minimized to avoid condensation on the parts and atmospheres should be free of 
chlorine and sulphur bearing compounds. For optimized solderability chip stock should be used promptly, preferably within three years
of receipt.
? KEMET Electronics Corporation ? P.O. Box 5928 ? Greenville, SC 29606 (864) 963-6300 ? www.kemet.com
T2005_T491 ? 10/8/2013
16
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