Document Number: 25127

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Revision: 25-Aug-08

255

EYZ

Aluminum Capacitors

Power Printed Wiring Style

Vishay Roederstein

RIPPLE CURRENT AND USEFUL LIFE

Fig.9 Multiplier of usefil life as a function of ambient temperature and ripple current load

I

I

(1) Useful life at 105 °C and I

2.7

2.6

2.5

2.4

2.3

2.2

2.1

2.0

1.9

1.8

1.6

1.5

1.7

1.4

1.3

1.2

1.1

1.0

0.8

0.5

0.0

40

50

60

70

80

90

100

110

T

(1)

Life multiplier

I

A

I

R

FREQUENCY

(Hz)

50

0.93

0.91

0.86

100

1.00

1.00

1.00

200

1.04

1.05

1.13

400

1.07

1.09

1.21

1000

1.11

1.13

1.29

2000

1.13

1.15

1.32

4000

1.15

1.18

1.35

≥ 10 000

1.18

1.22

1.40