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| CI830 3BSE013252R1 |
1.2
180
4.1
85
C44PXGR5680RASK
Cap
Value
VAC
Rated
Voltage
Surge
Voltage
D H Irms
RS
ESL
Thermal
Resistance
dV/dt
(V/µs)
Part Number
1 Maximum admissible RMS current THS ≤ 75°C; ∆Tmax ≤ 35°C.
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© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard
F3117_C44P-R • 5/19/2021
Fort Lauderdale, FL 33301 USA • 954-766-2800 •
Aluminum Can Power Film Capacitors
C44P-R, 330 - 1,000 VAC/700 - 2,300 VDC, for PFC & AC Filter
Lifetime Expectancy/Failure Quota Graphs
Power Losses and Hot Spot Temperature Calculation
At each frequency, the Power Losses are the sum of:
1. Dielectric Power Losses
PD(fi ) = 2 * π * fi * C * V(fi)2 * tgδ0
which can be alternatively calculated as
PD(fi ) =
I(f
i)2
* tgδ0
2 * π * f
i * C
where: tgδ0 = 2 * 10−4
2. Joule Power Losses:
PJ (fi ) = Rs * I(fi)2
The Total Power Losses are the sum of the components at each frequency:
( ) ( )
[
]
∑
+
=
i
iJiD
T
fPfPP
The Thermal Jump in the Hot Spot is:
ΔTHS = PT * Rth-hs
The Hot Spot Temperature is:
THS = Ta + ΔTHS
Limits for the formulas
The limits listed below should not be exceeded:
1.
2.
THS =Ta + ΔTHS ≤ (THS )MAX
Where Ta is the ambient temperature (steady state temperature of the
cooling air flowing around the capacitor, measured at 100 mm of distance
from the capacitor and at a height of 2/3 height of the capacitor).
3. Maximum case temperature (TCASE) ≤ 70°C
Example of calculation
Part Number: C44PKGR6100RASJ
Rated VRMS = 440 [VRMS]
Rated IRMS = 30 [A]
Rs = 2.7 [mΩ]
Rth = 5.7 [°C/W]
Fundamental Frequency F1 = 50 [Hz]
Ripple Frequency F2 = 7,000 [Hz]
Fundamental Voltage V1 = 440 [V~]
Ripple Current I2 = 27 [A]
Ta = 39°C
I1 = I(50) = 2 * π * 50 * 100 * 10-6 * 440 = 13.8 [A]
V2 = V(7,000) = [27/(2 * π * 7,000 * 100 * 10−6 )] = 6.14 [V]
I RMS = √(13.82 + 272 ) = 30 ≤ 30 → Admitted
VRMS = √(4402 + 6.12 ) = 440 ≤ 440 → Admitted
PD(50) = 2 * π * 50 * 100 * 10-6 * 4402 * 2 * 10−4 = 1.22 [W]
PD(7,000) = [272 /(2 * π * 7,000 * 100 * 10−6 )] * 2 * 10−4 = 0.03 [W]
PJ (50) = 2.7 * 10−3 * [(2 *π * 50 * 100 * 10−6 * 440)2 ] = 0.52 [W]
PJ (7,000) = 2.7 * 10−3 * 272 = 1.97 [W]
PT = 1.22 + 0.03 + 0.52 + 1.97 = 3.74 [W]
ΔTHS = 5.7 * 3.74 = 21 [°C]
THS = Ta + ΔTHS
THS = 39 + 21 = 60 [°C] →OK since hot spot temperature is less
than maximum admitted
Expected Life at THS = 75°C → 100,000 hours (see lifetime curve)
Expected Life at THS = 60°C → 140,000 hours (see lifetime curve)
RMS
i
i
VfV
≤
∑
2
)(
RMS
i
i
IfI
≤
∑
2
)(
V = Operating Voltage [VAC]
Vrms = Rated Voltage [VAC]
0.60
0.70
0.80
0.90
1.00
1.10
1.20
1.30
1.40
100
1,000 10,000 100,000 1,000,000
≤60°C
70°C
75°C
80°C
Lifetime Curve C44P R
Hot Spot
Temperature
[°C]
Lifetime Expectancy (hours)
1
10
100
1,000
0.6 0.65 0.7 0.75 0.8 0.85 0.9 0.95 1 1.05 1.1
Voltage Ratio (V/Vrms)
FIT at Hot Spot Temperatures
80
75
70
≤60
Hot Spot
Temperature °C
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Voltage Ratio (V/V ) RMS
FIT6
© KEMET Electronics Corporation • KEMET Tower • One East Broward Boulevard
F3117_C44P-R • 5/19/2021
Fort Lauderdale, FL 33301 USA • 954-766-2800 •
Aluminum Can Power Film Capacitors
C44P-R, 330 - 1,000 VAC/700 - 2,300 VDC, for PFC & AC Filter
Marking
C44PLGR6400RASJ
400µF±5%
-25/70/56
SH NO PCBs
PROTECTED 10000AFC
BJ1 17340275
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