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Rue Ampère B.P. 4

42290 SORBIERS - FRANCE

E-Mail : celduc-relais@celduc.com

Fax +33 (0) 4 77 53 85 51

Service Commercial France Tél. : +33 (0) 4 77 53 90 20

Sales Dept.For Europe Tel. : +33 (0) 4 77 53 90 21

Sales Dept. Asia : Tél. +33 (0) 4 77 53 90 19

www.celduc.com

celduc

Thermal specifications .

Current according ambient temperature :

Ø

The temperature reached are acceptable for the com-

ponents. These values are in compliance with most of

SSRs manufacturers.

In a cabinet with a minimum of ventilation or a non

permanent current, these values are correct.

Ø

according to EN60947-4-3 with a maximum rise

temperature of 50°C (@40°C) for a permanent work-

ing and in air calm ( test during 8 hours).

Ø

For a non permanent current, you can calcule

the average power = Pd x duty cycle and check the

rise temperature : Tj = Pd x Rthj/a (Pd and Rthj/a are

given page 2)). The junction temperature must not

exceed 125°C at the maximum ambient temperature.

The maximum current is limited to the size of the

thyristors = 50A.

Ø

The thermal constant (Cth) of the product is 9

minutes. That means the rise temperature is only 63%

of the stabilized temperature after a running time of

9 minutes.

1

10

1

0,1

0,01

0

200

400

600

0

t (s)

No repetive surge current without voltage reapplied.

Repetive surge current with voltage reapplied.

Fig.3 Surge current : Itsm (Apeak) = f(t) for 50A models with Itsm =550A

Overload current .

reapplied . This curve is used for the

determination of the protection.

with initial Tj = 70°C. In normal working , this

curve musn't be exceed. Be carefull, the

repetition of the surge current decrease the

lifetime SSR's .

M5

12,7mm

M4

88±2mm

Ø

Warning ! semiconductor relays don't provide any galvanic insulation between the load and the mains. Always use in

conjunction with an adapted circuit breaker with isolation feature or a similar device in order to ensure a reliable isolation in the

event of wrong function and when the relay must be insulated from the mains (maintenance ; if not used for a long duration ...).

page 3 / 4/GB

S/CLP/SIM765170/B/21/04/2004

0

5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85

0

0

5

10

15

20

25

30

35

40

45

0

Tambient (°C)

2

1

Mounting and dismounting on DIN rail without any tool.

Panel Mounting

DIN rail connected to

protection wire (ground) .

Mounting

Dismounting

celpac®

fig 2

fig 3

2

1