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High Performance Thermal-Magnetic Circuit Breakers 446/447/449

2013/14

5

5 - 28

12

4 6 8 10

20

40

… times rated current

10000

1000

100

10

1

0.1

0.01

0.001

60 80100

Dimensions

Typical time/current characteristics at +23 °C/+73.4 °F

Internal connection diagrams

12

43.5

100

N/O 6/7

ø20

hex nut M8 or 5/16"-18-NC

14 mm/.551 in. usable thread length

tightening torque max. 3.5 Nm

60

hex screw

ISO 4017-M12x30-Cu2-E1P

ø26

35

106

hex nut

ISO 4032-M12-Cu2-E1P

tightening torque

max. 10 Nm

lock washer

DIN 137-B12-

X12CrNi 177

N/C 4/5

FA-terminal (8)

170

140

current rating in A

11

AUS OFF

AUS OFF

EIN ON

flat head screw ISO 1580-M3.5x5

tightening torque max. 0.55 Nm

blade terminal DIN 46244-C-MS-S

2.36

1.02

.787

1.38

3.94

6.69

5.51

.433

.472

1.71

4.17

line 1

5

4

7

6

I >

2

line 1

I >

2

Si

FA

8

recommended

link for FA coil

protection

… times rated current

-55 °C

-67 °F

+23 °C

+73.4 °F

+75 °C

+167 °F

… times rated current

… times rated current

12

4 6 8 10

20

40

10000

1000

100

10

1

0.1

0.01

0.001

60 80100

12

4 6 8 10

20

40

10000

1000

100

10

1

0.1

0.01

0.001

60 80100

12

4 6 8 10

20

40

10000

1000

100

10

1

0.1

0.01

0.001

60 80100

447-…

DC

449-… 125…400 A

DC

449-… 500 A (50% ON duty/60 min) DC

Circuit breakers with remote disconnection facility will trip 10% faster

.

Typical time/current characteristics

446-...

DC

This is a metric design and millimeter dimensions take precedence ( mm )

inch