Datasheet

4© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard T2073_T59X • 3/6/2020
Fort Lauderdale, FL 33301 USA • 954-766-2800 • www.kemet.com
4
KEMET Organic Capacitor (KO-CAP
®
) – Automotive Grade
T591, T598, T597, and T599 High Humidity and High Temperature Automotive Grade Polymer Electrolytic, 2.5 - 50 VDC
Reliability
KO-CAPcapacitorshaveanaveragefailurerateof0.5%/1,000hoursatcategoryvoltage,U
C
,andcategorytemperature,
T
C
.ThesecapacitorsarequaliedusingindustryteststandardsatU
C
and T
C
. The minimum test time (1,000 hours or 2,000
hours) is dependent on the product.
TheactuallifeexpectancyofKO-CAPcapacitorsincreaseswhenapplicationvoltage,U
A
, and application temperature, T
A
,
are lower than U
C
and T
C
.Asageneralguideline,whenU
A
< 0.9 * U
C
and T
A
<85°C,thelifeexpectancywilltypicallyexceed
theusefullifetimeofmosthardware(>10years).
ThelifetimeofaKO-CAPcapacitorataspecicapplicationvoltageandtemperaturecanbemodeledusingtheequations
below.Afailureisdenedaspassingenoughcurrenttoblowa1-ampfuse.Thecalculationisanestimationbasedon
empiricalresultsandisnotaguarantee.
TAF = e
[ ( )]
E
a
k
1
273+T
A
1
273+T
C
TAF = acceleration factor due to temperature, unitless
where:
E
a
= activation energy, 1.4 eV
k = Boltzmann’s constant, 8.617E-5 eV/K
T
A
= application temperature, °C
T
C
= category temperature, °C
VAF =
( )
U
C
U
A
n
VAF = acceleration factor due to voltage, unitless
where:
U
C
= category voltage, volt
U
A
= application voltage, volt
n = exponent, 16
AF = VAF * TAF
AF = acceleration factor, unitless
where:
TAF = accerlation factor due to temperature, unitless
VAF = acceleration factor due to voltage, unitless
* AFLife
U
A
,T
A
= Life
U
C
,T
C
Life
UA, TA
= guaranteed life application voltage
and temperature, years
where:
AF = acceleration factor, unitless
Life
UC, TC
= guaranteed life category voltage
and temperature, years
Reliability Table 1 – Common Temperature Range Classications
85°C (T
R
)/
85°C (T
C
)
Ratedvoltage(U
R
)
2.5 4.0 6.3 8.0 10.0 12.5 16.0 20.0 25.0 35.0 50.0 63.0 75.0
Categoryvoltage(U
C
)
2.5 4.0 6.3 8.0 10.0 12.5 16.0 20.0 25.0 35.0 50.0 63.0 75.0
105°C (T
R
)/
105°C (T
C
)
Ratedvoltage(U
R
)
2.5 4.0 6.3 8.0 10.0 12.5 16.0 20.0 25.0 35.0 50.0 63.0 75.0
Categoryvoltage(U
C
)
2.5 4.0 6.3 8.0 10.0 12.5 16.0 20.0 25.0 35.0 50.0 63.0 75.0
105°C (T
R
)/
125°C (T
C
)
Ratedvoltage(U
R
)
2.5 4.0 6.3 8.0 10.0 12.5 16.0 20.0 25.0 35.0 50.0 63.0 75.0
Categoryvoltage(U
C
)
1.7 2.7 4.2 5.4 6.7 8.4 10.7 13.4 16.8 23.5 33.5 42.2 50.3
105°C (T
R
)/
150°C (T
C
)
Ratedvoltage(U
R
)
2.5 4.0 6.3 8.0 10.0 12.5 16.0 20.0 25.0 35.0 50.0 63.0 75.0
Categoryvoltage(U
C
)
1.7 2.7 4.2 5.4 6.7 8.4 10.7 13.4 16.8 23.5 33.5 42.2 50.3
Terms:
Category voltage, U
C
: Maximum recommended peak DC operating voltage for continuous operation at the category temperature, T
C
.
Rated voltage, U
R
: Maximum recommended peak DC operating voltage for continuous operation up to the rated temperature, T
R
.
Category temperature, T
C
: Maximum recommended operating temperature. Voltage derating may be required at T
C
.
Rated temperature, T
R
: Maximum recommended operating temperature without voltage derating. T
R
is equal to or lower than T
C
.