DATASHEET
LIFE (Cont'd)
K2 SERIES ULTRACAPACITORS
ESR Change
(% increase from maximum initial value)
Test Current
Shelf Life
(Stored uncharged at 25 o C)
100%
65 A
4 years
100%
75 A
4 years
100%
100 A
4 years
100%
100 A
4 years
100%
100 A
4 years
ESR AND CAPACITANCE VS TEMPERATURE
180%
170%
160%
150%
140%
130%
120%
110%
100%
90%
80%
Capacitance
DC ESR
-60
-40
-20
0
20
40
60
80
Temperature (°C)
NOTES
5. P max =
6. E max =
1. CapacitanceandESR DC measuredat25°Cusing
specified test current per waveform below.
2. Absolute maximum voltage, non-repeated. Not to
exceed 1 second.
3. After 72 hours at rated voltage. Initial leakage current
can be higher.
0.12V 2
4. Per IEC 62391-2, P d = ESR DC x mass
V 2
4 x ESR DC x mass
? CV 2
3,600 x mass
7. E stored = ? CV 2
3,600
8. ?T=I RMS2 x ESR x R ca
9. Cycle using specified test current per waveform
below.
10. Cycle life varies depending upon application-specific
characteristics. Actual results will vary.
11. Per United Nations material classification UN3499, all
Maxwell ultracapacitors have less than 10 Wh capacity
to meet the requirements of Special Provisions 361.
When packaged according to the regulation, both
individual ultracapacitors and modules composed
of those ultracapacitors shipped by Maxwell can be
transported without being treated as dangerous
goods (hazardous materials).
Page 3
Document number: 1015370.4
maxwell.com
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