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Tantalum Surface Mount Capacitors – Standard Tantalum
T491 Industrial Grade MnO 2 Series
SPICE
For a detailed analysis of specific part numbers, please visit www.kemet.com for a free download of KEMET's SPICE software. 
The KEMET SPICE program is freeware intended to aid design engineers in analyzing the performance of these capacitors over
frequency, temperature, ripple, and DC bias conditions.
Ordering Information
T
491
X
157
K
020
A
T
Capacitor
Class
T=
Tantalum
Series
Industrial
Case Size
A, B, C, D,
E, S, T, U,
V, X
Capacitance
Code (pF)
First two digits
represent
significant 
figures. Third digit 
specifies number 
of zeros.
Capacitance
Tolerance
K = ±10%
M = ±20%
Voltage
2R5 = 2.5 V
003 = 3 V
004 = 4 V
006 = 6.3 V
010 = 10 V
016 = 16 V
020 = 20 V
025 = 25 V
035 = 35 V
050 = 50 V
Failure Rate/
Design
A = N/A
Lead Material
T = 100% Matte Tin (Sn)
Plated*
H = Standard Solder
Coated (SnPb 5% Pb
minimum)
G = Gold Plated (A, B, C,
D, X only)
N = Non-Magnetic 100%
Tin (Sn)
M = Non-Magnetic (SnPb)
Packaging (C-Spec)
Blank = 7" Reel
7280 = 13" Reel
Performance Characteristics
Item
Operating Temperature
Rated Capacitance Range
Capacitance Tolerance
Rated Voltage Range
DF (120 Hz)
ESR (100 kHz)
Leakage Current
Performance Characteristics
-55°C to 125°C
0.1 – 1,000 μF @ 120 Hz/25°C
K Tolerance (10%), M Tolerance (20%)
2.5 – 50 V
Refer to Part Number Electrical Specification Table 
Refer to Part Number Electrical Specification Table 
≤ 0.01 CV (μA) at rated voltage after 5 minutes
? KEMET Electronics Corporation ? P.O. Box 5928 ? Greenville, SC 29606 (864) 963-6300 ? www.kemet.com
T2005_T491 ? 10/8/2013
2
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