C44HKGR6100ZASK datasheet(5/8 Pages) KEMET

Part #	C44HKGR6100ZASK

Description	C44H Series, 330 - 440 VAC, 700 - 1,000 VDC, for PFC and AC Filter

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Manufacturer	KEMET [Kemet Corporation]

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F3054_C44H_RADIAL • 9/20/2016

5

Power and AC Film Capacitors – Aluminum Can Power Film Capacitors

C44H Series, 330 – 440 VAC, 700 – 1,000 VDC, for PFC and 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

P

D(fi) = 2 * π * fi* C * V(fi)

2

* tgδ

0

which can be alternatively calculated as

P

D(fi) =

I(f

i)

2

* tgδ

0

2 * π * f

i* C

where: tgδ

0 = 2 * 10

-4

2. Joule Power Losses:

P

J(fi) = Rs * I(fi)

2

The Total Power Losses are the sum of the components at each frequency:

( )

[

]

∑

+

=

i

J

i

D

T

f

P

f

P

The Thermal Jump in the Hot Spot is:

ΔT

HS = PT * Rth-hs

The Hot Spot Temperature is:

T

HS = Ta + ΔTHS

Limits for the formulas

The limits listed below should not be exceeded:

1.

2.

T

HS = Ta + ΔTHS ≤ (THS )MAX

Where T

a 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 (T

CASE) ≤ 70°C

Example of calculation

Part Number: C44HKGR6100AASJ

Rated V

RMS = 440 [VRMS]

Rated I

RMS = 30 [A]

R

s = 4.1 [mΩ]

R

th = 5.0 [°C/W]

Fundamental Frequency F

1 = 50 [Hz]

Ripple Frequency F

2 = 7000 [Hz]

Fundamental Voltage V

1 = 440 [V~]

Ripple Current I

2 = 27 [A]

T

a = 35°C

I

1 = I(50) = 2 * π * 50 * 100 * 10

-6

* 440 = 13.8 [A]

V

2 = V(7000) = [27/(2 * π * 7000 * 100 * 10

-6

)] = 6.14 [V]

I

RMS = √(13.8

2

+ 272) = 30 ≤ 30 → Admitted

V

RMS = √(440

2

+ 6.12) = 440 ≤ 440 → Admitted

P

D(50) = 2 * π * 50 * 100 * 10

-6

* 4402 * 2 * 10-4 = 1.22 [W]

P

D(7000) = [27

2

/(2 * π * 7000 * 100 * 10-6)] * 2 * 10-4 = 0.03 [W]

P

J(50) = 3.5 * 10

-3

* [(2 *π * 50 * 100 * 10-6 * 440)2] = 0.67 [W]

P

J(7000) = 3.5 * 10

-3

* 272 = 2.55 [W]

P

T = 1.22 + 0.03 + 0.78 + 3 = 5 [W]

ΔT

HS = 5 * 5 = 25 [°C]

T

HS = Ta + ΔTHS

T

HS = 35 + 25 = 60 [°C] → OK since hot spot temperature is less

than maximum admitted

Expected Life @ T

HS = 70°C → 100,000 hours (see lifetime curve)

Expected Life @ T

HS = 60°C → 140,000 hours (see lifetime curve)

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

Lifetime curve C44H series

Hot Spot

temperature

[°C]

Lifetime Expectancy [h]

V = Operating Voltage [VAC]

V

rms = Rated Voltage [VAC]

RMS

i

V

f

V

≤

∑

2

)

(

RMS

i

I

f

I

≤

∑

2

)

(

1

10

100

1000

0,6

0,7

0,8

0,9

1

1,1

VoltageRatio [U/Urms]

FIT @ Hot Spot Temperatures

75

70

≤60

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