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.
1
446-...
Technical data
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
Overvoltage category
(IEC 60664)
pollution degree 2 / 3
Resulting in a rated impulse withstand
voltage of 500 V at DC 28 V to DIN
EN 60664-1
Dielectric strength
(IEC 60664 and 60664A) test voltage
operating area
AC 1,500 V
main circuit to
auxiliary contacts
AC 1,500 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
to VG 95210, sheet 19,
IEC 60068-2-6, test Fc:
without aux. 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)
Shock
to VG 95210, sheet 28,
IEC 60068-2-27, test Ea:
without aux. contacts: 50 g (11 ms)
with auxiliary contacts: 20 g (11 ms)
Corrosion
96 hours at 5 % salt mist
to VG 95210, sheet 2,
IEC 60068-2-11, test Ka
Humidity
240 hours at 95 % RH
to VG 95210, sheet 7,
IEC 60068-2-3, test C
Mass
approx. 850 g
Voltage rating
Current rating range
Ordering information
Type
446
447
449
No.
single pole base mounting, fast characteristic curve
single pole base mounting, medium delay characteristic curve
single pole base mounting, delayed characteristic curve
Terminal design, mounting
K
screw terminals M12, insertion nuts M8
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)
FA24
DC 24 V coil voltage
Current ratings
30...400 A
type 446
100...400 A
type 447
125...500 A
type 449
ordering example
447-...
449-...
447 - K - H - FN - ... - ... - 400 A
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
ratings (A)
Type 446:
30
40
50
60
70
80
90
100
125
150
170
200
225
250
300
350
400
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
< 0.001
Internal
resistance (Ω)
Current
ratings (A)
Type 447:
100
125
160
225
300
400
Type 449:
125
160
225
315
350
400
500
< 0.001
< 0.001
< 0.001
< 0.001
< 0.001
< 0.001
< 0.001
< 0.002
< 0.001
< 0.001
< 0.001
< 0.001
< 0.001
Internal
resistance (Ω)
Approvals
Authority
Standard
UL
CSA
UL
CSA
Bw
UL 1077
C22.2 No 235
UL 1077
C22.2 No 235
95345, part 15
Rated voltage
DC 28 V
DC 28 V
DC 28 V
DC 28 V
DC 28 V
Current ratings
up to 400 A
up to 400 A
100...350 A
100…350 A
125...500 A
only with 50 % ON duty
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.
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1
High Performance Thermal-Magnetic Circuit Breakers 446/447/449
Dimensions
447-K-H-FN-Si-FA (<350A)
449-K-H-FN-Si-FA (<350A)
Internal connection diagrams
line 1
line 1
5
Si
7
42
30
40
4
6
recommended
link for FA coil
protection
60 ± 0.3
ø26
hex nut M8 or 5/16"-18-NC
14 mm/.551 in. usable thread length
tightening torque max. 3.5 Nm
I>
8
2
FA
I>
2
15
± 1,5
0,5
23
1
OFF
ON
ø20
6
FA-terminal (8)
N/C 4/5
hex nut
ISO 4032-M12-Cu2-E1P
tightening torque
max. 10 Nm
lock washer
DIN 137-B12-
X12CrNi 177
Typical time/current characteristics at +23 °C/+73.4 °F
446-...
10000
106
104
N/O 6/7
max. 77
4
DC
23.5
35±0.2
100
170
140
current rating in A
AUS OFF
EIN ON
AUS OFF
1000
hex screw
ISO 4017-M12x30-Cu2-E1P
2
Trrip time in seconds
100
10
28 V DC
1
12
flat head screw ISO 1580-M3,5x5
tightening torque max. 0.55 Nm
43.5
12
0.1
0.01
This is a metric design and millimeter dimensions take precedence ( mm )
inch
0.001
1
2
20
40 60 80 100
4 6 8 10
… times rated current
Typical time/current characteristics
447-…
10000
DC
449-… 125…400 A
10000
DC
449-… 500 A
(50% ON duty/60 min)
10000
DC
1000
1000
1000
Trip time in seconds
Trip time in seconds
100
100
Trip time in seconds
1
2
4 6 8 10
20
40 60 80 100
… times rated current
100
10
10
10
1
1
1
0.1
0.1
0.1
0.01
0.01
0.01
0.001
1
2
4 6 8 10
20
40 60 80 100
-55 °C
-67 °F
0.001
0.001
1
2
+75 °C
+167 °F
… times rated current
+23 °C
+73.4 °F
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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