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
447-...
449-...
Ordering information
Type No.
446
447
449
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
Voltage rating
DC 28 V
Current rating range
type 446: 30...400 A
type 447: 100...400 A
type 449: 125...500 A
K
screw terminals M12, insertion nuts M8
Manual release
H
standard
Version
Auxiliary circuit
10 A
N
general application (type 446 only)
Electrical remote disconnection (-FA)
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)
FA24 DC 24 V coil voltage
Current ratings
operating voltage
operating current
max. pulse time
switching time
DC 12 V or DC 24 V
approx. 18 A or 12 A
10 ms < tON < 20 ms / tOFF > 10 s
< 20 ms
Typical life
1,000 operations at IN
2,000 operations mechanical
Ambient temperature
-55...+75 °C (-67...+167 °F)
30...400 A type 446
100...400 A type 447
125...500 A type 449
Insulation co-ordination
(IEC 60664 and 60664A) withstand voltage
1.5 kV
rated impulse
pollution
degree
3
Dielectric strength
(IEC 60664 and 60664A) test voltage
operating area
main circuit to
auxiliary contacts
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.
AC 1,500 V
AC 1,500 V
Insulation resistance
> 100 MΩ (DC 500 V)
10,000 A
Interrupting capacity Icn
Standard current ratings and typical internal resistance values
Degree of protection
(IEC 60529/DIN 40050)
operating area IP40
terminal area IP00
Internal
Internal
Current
Current
ratings (A)
ratings (A)
resistance (Ω)
resistance (Ω)
Vibration
to VG 95210, sheet 19,
IEC 60068-2-6, test Fc:
Type 446:
30
Type 447:
100
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)
0.006
< 0.002
< 0.001
< 0.001
< 0.001
< 0.001
< 0.001
40
0.0048
0.0038
0.0028
0.0025
0.0023
0.0019
0.0016
< 0.001
< 0.001
< 0.001
< 0.001
< 0.001
125
Shock
to VG 95210, sheet 28,
IEC 60068-2-27, test Ea:
50
160
without aux. contacts: 50 g (11 ms)
with auxiliary contacts: 20 g (11 ms)
60
225
70
300
Corrosion
Humidity
Mass
96 hours at 5 % salt mist
to VG 95210, sheet 2,
IEC 60068-2-11, test Ka
80
400
90
Type 449:
125
100
125
150
170
200
225
< 0.001
< 0.001
< 0.001
< 0.001
< 0.001
< 0.001
< 0.001
240 hours at 95 % RH
to VG 95210, sheet 7,
IEC 60068-2-3, test C
160
225
approx. 850 g
315
350
Approvals
400
250
300
350
400
< 0.001
< 0.001
< 0.001
< 0.001
500
Authority
Standard
Rated voltage Current ratings
only with 50 % ON duty
UL
CSA C22.2 No 235
UL UL 1077
CSA C22.2 No 235
Bw 95345, part 15
UL 1077
DC 28 V
DC 28 V
DC 28 V
DC 28 V
up to 400 A
up to 400 A
100...350 A
100…350 A
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.
DC 28 V
125...500 A
1646
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