B43750 / B43770

Useful life

Depending on the application, interpret the graph as follows:

1. Natural cooling

2. Cooling of base

3. Cooling of terminals and base

Ensure that the temperature of the cooled terminals is lower than that of the case base.

Due to the current load capability of the contact elements, the following current limits must not be

exceeded, even if the frequency and temperature factors have been taken into account:

Capacitor diameter

Capacitor base cooling

Terminal and capacitor base cooling

64,3 mm

62 A

75 A

76,9 mm

80 A

100 A

91,0 mm

80 A

100 A

0,5

0

40

50

60

70

3,5

2,0

1,5

1,0

2,5

3,0

5,0

A

80

TT

;

90

100

110

KAL0566-3

C

B43750/770

Ι

R

R

;

(B; T+B)

~

1) Refer to page 40 for an explanation on how to interpret the useful life graphs.