High Performance Thermal-Magnetic Circuit Breakers 446/447/449
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1646 1
1
Description
Typical applications
Ordering information
Approvals
Technical data
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.
Heavy duty vehicles, battery systems, process control.
446-... 447-... 449-...
Standard current ratings and typical internal resistance values
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
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)
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.
Voltage rating DC 28 V
Current rating range 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 1,500 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
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.
Current
ratings (A)
Internal
resistance (Ω)
Current
ratings (A)
Internal
resistance (Ω)
Type 446: Type 447:
30 0.006 100 < 0.002
40 0.0048 125 < 0.001
50 0.0038 160 < 0.001
60 0.0028 225 < 0.001
70 0.0025 300 < 0.001
80 0.0023 400 < 0.001
90 0.0019
Type 449:
100 0.0016 125 < 0.001
125 < 0.001 160 < 0.001
150 < 0.001 225 < 0.001
170 < 0.001 315 < 0.001
200 < 0.001 350 < 0.001
225 < 0.001 400 < 0.001
250 < 0.001 500 < 0.001
300 < 0.001
only with 50 % ON duty
350 < 0.001
400 < 0.001
Authority Standard Rated voltage Current ratings
Type 446/
Type 447
UL UL 1077 DC 28 V up to 400 A
CSA C22.2 No 235 DC 28 V up to 400 A
Type 449:
UL UL 1077 DC 28 V 100...350 A
CSA C22.2 No 235
DC 28 V 100…350 A
Bw 95345, part 15
DC 28 V 125...500 A
