High Performance Thermal-Magnetic Circuit Breakers 446/447/449
Description
Single pole thermal-magnetic circuit breakers with tease-free, trip-free,
press-to-reset snap action mechanism and special dual button manual
release which avoids the danger of unintended disconnection (M-type
TM CBE to EN 60934). Surface mounted, compact design available
with fast acting, standard and delayed switching characteristics.
Options include auxiliary contact and remote electrical disconnection.
Typical applications
Heavy duty vehicles, battery systems, process control.
446-...
Technical data
447-...
449-...
Ordering information
Type No.
446
single pole base mounting, fast characteristic curve
447
single pole base mounting, medium delay characteristic curve
449
single pole base mounting, delayed characteristic curve
Terminal design, mounting
K
screw terminals M12, insertion nuts M8
S
screw terminals M12, insertion nuts 5/16-18
Manual release
H
standard
Version
N
general application (type 446 only)
FN
general application (types 447 and 449 only)
Auxiliary contacts (optional)
Si
2 electrically separate auxiliary contacts
with screw terminals M3.5 and
blade terminals DIN 46244-C-MS-S
Remote trip (optional for types 447 and 449)
FA12
DC 12 V coil voltage
FA24
DC 24 V coil voltage
Current ratings
30...400 A
type 446
100...400 A
type 447
125...500 A
type 449
447 - K - H - FN - ... - ... - 400 A
ordering example
The exact part number required can be built up from the table of choices shown
above. Ordering references for optional features should be omitted if not required.
Standard current ratings and typical internal resistance values
Current
rating (A)
30
40
50
60
70
80
90
100
125
150
170
200
225
250
300
350
400
Internal
resistance (Ω)
0.006
0.0048
0.0038
0.0028
0.0025
0.0023
0.0019
0.0016
< 0.001
< 0.001
< 0.001
< 0.001
< 0.001
< 0.001
< 0.001
< 0.001
< 0.00
Current
rating (A)
Type 447
100
125
160
225
300
400
Type 449
125
160
225
315
350
400
500
only with 50
Internal
resistance (Ω)
<
<
<
<
<
<
0.002
0.001
0.001
0.001
0.001
0.001
DC 28 V
type 446: 30...400 A
type 447: 100...400 A
type 449: 125...500 A
Auxiliary circuit
10 A
Electrical remote disconnection (-FA)
operating voltage
DC 12 V or DC 24 V
operating current
approx. 18 A or 12 A
max. pulse time
10 ms < t
ON
< 20 ms / t
OFF
> 10 s
switching time
< 20 ms
Typical life
1,000 operations at I
N
2,000 operations mechanical
Ambient temperature
-55...+75 °C (-67...+167 °F)
Insulation co-ordination
rated impulse
pollution
(IEC 60664 and 60664A) withstand voltage
degree
1.5 kV
3
Dielectric strength
(IEC 60664 and 60664A) test voltage
operating area
AC 1,000 V
main circuit to
auxiliary contacts
AC 1,000 V
Insulation resistance
>100 MΩ (DC 500 V)
Interrupting capacity I
cn
10,000 A
Degree of protection
operating area IP40
(IEC 60529/DIN 40050)
terminal area IP00
Vibration
without auxiliary contacts:
10 g (56-500 Hz) ±0.76 mm (10-55 Hz)
with auxiliary contacts:
4 g (56-500 Hz) ±0.30 mm (10-56 Hz)
to VG 95210, sheet 19/IEC 60068-2-6, test Fc
Voltage rating
Current rating range
4
Type 446
Shock
without auxiliary contacts: 50 g (11 ms)
with auxiliary contacts: 20 g (11 ms)
to VG 95210, sheet 28/IEC 60068-2-27, test Ea
Corrosion
Humidity
Mass
96 hours at 5 % salt mist
to VG 95210, sheet 2/IEC 60068-2-11, test Ka
240 hours at 95 % RH
to VG 95210, sheet 7/IEC 60068-2-3, test C
< 0.001
< 0.001
< 0.001
< 0.001
< 0.001
< 0.001
< 0.001
% ON duty
approx. 850 g
Approvals
Authority
Type 446:
Type 447:
Type 449:
All dimensions without tolerances are for reference only. In the interest of improved design,
performance and cost effectiveness the right to make changes in these specifications
without notice is reserved.Product markings may not be exactly as the ordering codes.
Errors and omissions excepted.
Voltage ratings
UL
DC 28 V
UL
DC 28 V
QPL Sweden
DC 28 V
UL
DC 28 V
VG 95345, part 15
DC 28 V
Current ratings
30...400 A
100...400 A
125...400 A
125...350 A
125...500 A
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High Performance Thermal-Magnetic Circuit Breakers 446/447/449
Dimensions
Internal connection diagrams
line 1
40
1.58
30
1.18
line 1
5
Si
7
4
60
2.36
ø26
23 OFF
.906
ON
15
.591
6
.236
1.02
6
recommended
link for FA coil
protection
hex nut M8 or 5/16"-18-NC
14 mm/.551 in. usable thread length
tightening torque max. 3.5 Nm
ø20
.787
FA-terminal (8)
hex nut
ISO 4032-M12-Cu2-E1P
tightening torque
max. 4.5 Nm
lock washer
DIN 137-B12-
X12CrNi 177
I>
8
2
FA
I>
2
13
.512
Typical time/current characteristics at +23°C/+73.4°F
446-...
10000
N/C 4/5
N/O 6/7
4
.157
106
4.17
104
4.09
DC
58
2.28
23.5
.925
35
1.38
2
.079
100
3.94
hex screw
ISO 4017-M12x30-Cu2-E1P
Trip time in seconds
12
.472
1000
4
170
6.69
140
5.51
current rating in A
AUS OFF
EIN ON
AUS OFF
100
10
1
11
.433
blade terminal DIN 46244-C-MS-S
flat head screw ISO 1580-M3.5x5
tightening torque max. 0.55 Nm
43.5
1.71
0.1
0.01
0.001
1
2
4 6 8 10
20
40 60 80 100
… times rated current
This is a metric design and millimeter dimensions take precedence ( mm )
inch
Typical time/current characteristics
447-…
10000
DC
449-…
10000
125 … 400 A
DC
449-…
10000
500 A
(50% ON duty/60 min)
DC
1000
1000
1000
Trip time in seconds
Trip time in seconds
10
10
Trip time in seconds
100
100
100
10
1
1
1
0.1
0.1
0.1
0.01
0.01
0.01
0.001
1
+75
°C
+167
°F
2
4 6 8 10
20
40 60 80 100
-55
°C
-67
°F
… times rated current
+23
°C
+73.4
°F
0.001
1
2
4 6 8 10
20
40 60 80 100
… times rated current
0.001
1
2
4 6 8 10
20
40 60 80100
… times rated current
Circuit breakers with remote disconnection facility will trip 10% faster.
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