https://www.phoenixcontact.com/pi/products/2905744
Electronic device circuit breaker - CBM E8 24DC/0.5-10A NO-
R - 2905744
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Multi-channel, electronic device circuit breaker with active current limitation for protecting eight loads at 24 V
DC in the event of overload and short circuit. With nominal current assistant and electronic locking of the set
nominal currents. For installation on DIN rails.
Your advantages
For protection against voltage dips caused by overload and short circuit
Precise nominal current levels of 0.5 to 10 A
Integrated dynamic current limitation
Electronic locking mechanism to increase system safety
Early warning when exceeding 80% of the set nominal current per channel
Supply up to 80 A possible
Sophisticated remote signaling concept enables monitoring from any location
Slim design
Key Commercial Data
Packing unit
GTIN
GTIN
4046356992367
1 pc
Technical data
Dimensions
Height
Width
Depth
130 mm
41 mm
121 mm
Ambient conditions
Ambient temperature (operation)
Ambient temperature (storage/transport)
-25 °C ... 70 °C (Startup at -40 C type-tested)
-25 °C ... 65 °C (for UL 2367)
-40 °C ... 80 °C
11/08/2018 Page 1 / 7
https://www.phoenixcontact.com/pi/products/2905744
Electronic device circuit breaker - CBM E8 24DC/0.5-10A NO-
R - 2905744
Technical data
Ambient conditions
Humidity test
Altitude
Shock (operation)
Vibration (operation)
240 h, 95 % RH, 40 °C
≤ 6000 m (amsl (above mean sea level))
30g (IEC 60068-2-27, Test Ea)
5 Hz ... 24.9 Hz (Amplitude ±1.6 mm; in accordance with IEC 60068-2-6,
Test Fc)
24.9 Hz … 150 Hz (Acceleration 4g; in accordance with IEC 60068-2-6,
Test Fc with additional resonance frequency testing in accordance with
DNV GL)
Degree of protection
IP20
General
Flammability rating according to UL 94
Mounting type
Color
Number of positions
Protection class
Type
V-0
DIN rail: 35 mm
light grey RAL 7035
8
III
DIN rail module, one-piece
Electrical data
Fuse type
Rated surge voltage
Operating voltage
Rated voltage
Rated current I
N
electronic
0.5 kV
18 V DC ... 30 V DC
24 V DC
max. 80 A DC (for double supply IN+ with at least 2 x 6 mm²)
max. 40 A DC (Per terminal position)
max. 70 A DC (for UL 2367)
0.5 / 1 / 2 / 4 / 6 / 10 A DC (adjustable per output channel)
Measuring tolerance I
Feedback resistance
Fail-safe element
Active current limitation
Efficiency
Closed circuit current I
0
Power dissipation
Module initialization time
Waiting time after switch off of a channel
Temperature derating
typ. 40 % (0.5 ... 1 A)
typ. 10 % (2 - 10 A)
max. 35 V DC
15 A DC (per output channel)
typ. 2.0 x I
N
(0.5 - 1 A)
typ. 1.5 x I
N
(2 - 10 A)
> 99 %
typ. 50 mA
1.2 W (No-load operation)
17.2 W (Nominal operation)
3.3 s
10 s (at overload / short circuit)
40 A DC (at 70°C (65°C for UL 2367))
50 A DC (at 60 °C)
11/08/2018 Page 2 / 7
https://www.phoenixcontact.com/pi/products/2905744
Electronic device circuit breaker - CBM E8 24DC/0.5-10A NO-
R - 2905744
Technical data
Electrical data
60 A DC (at 50 °C)
70 A DC (at 40 °C)
80 A DC (at 40 °C)
70 A DC (at 40°C for UL 2367)
Tripping method
Required backup fuse
Dielectric strength
Contact type
MTBF (IEC 61709, SN 29500)
E (electronic)
not required, integrated failsafe element
max. 30 V DC (Load circuit)
without electrical isolation
1304293 h (at 25 °C)
858501 h (at 40 °C)
440048 h (at 60°C)
Shutdown time load circuit
Undervoltage shutdown load circuit
Surge voltage shutdown load circuit
Max. capacitive load load circuit
Output voltage status output
Output current status output
Input voltage reset input
Current consumption reset input
0.02 s (> 1.3 x I
N
)
30 s (1,1 ... 1,3 x I
N
)
≤ 17.8 V DC (active)
≥ 19 V DC (inactive)
≥ 30.5 V DC (active)
≤ 29.5 V DC (inactive)
75000 µF (per channel at 24 V DC)
24 V DC
max. 20 mA (when I > 80% at at least one channel)
7 V DC ... 30 V DC (Reset with falling edge)
typ. 0.4 mA (at 24 V DC)
Remote indication contact
Connection name
Switching function
Stripping length
Conductor cross section solid
Conductor cross section AWG
Conductor cross section, flexible, with ferrule, with plastic sleeve
Conductor cross section flexible, with ferrule without plastic sleeve
DC operating voltage
DC operating current
Remote indication circuit
N/O contact
10 mm
0.2 mm² ... 2.5 mm²
24 ... 12
1.5 mm² ... 0.25 mm²
0.25 mm² ... 2.5 mm²
0 V DC ... 30 V DC
1 mA DC ... 100 mA DC
Signaling
Channel LED off
Channel LED green
Channel LED yellow
Channel LED yellow-green
off (Channel switched off)
lit (Channel switched on)
flashing (Channel switched on, programming mode active)
lit (Channel switched on, channel load > 80% )
flashing (Channel switched on, nominal current assistant active)
11/08/2018 Page 3 / 7
https://www.phoenixcontact.com/pi/products/2905744
Electronic device circuit breaker - CBM E8 24DC/0.5-10A NO-
R - 2905744
Technical data
Signaling
Channel LED red
lit (Channel switched off, over- or undervoltage active)
ON temporarily (Channel switched off, 10 s cool-down phase, overload
or short-circuit release)
flashing (Channel switched off, ready to be switched back on, overload
or short-circuit release)
Channel LED red-yellow
Channel LED red-green
DC OK LED off
DC OK LED green
DC OK LED yellow
flashing (Channel switched on, overload mode, capacity approximately
110 ... 130% , shutdown after 30 s)
flashing (Channel switched off, programming mode active, current
adjustment after overload or short-circuit release)
off (No supply voltage)
lit (Operating voltage in nominal range 18 ... 30 V)
lit (Undervoltage active, voltage ≤ 17.8 V, active channels switched off
and channel LEDs are lit red)
flashing (Undervoltage shutdown inactive, device was in undervoltage
shutdown)
DC OK LED red
lit (Overvoltage shutdown active, voltage ≥ 30.5 V, channels switched off
and channel LEDs are lit red)
flashing (Overvoltage shutdown inactive, device was in overvoltage
shutdown)
Connection data
Connection name
Connection method
Stripping length
Conductor cross section solid
Conductor cross section AWG
Conductor cross section, flexible, with ferrule, with plastic sleeve
Conductor cross section flexible, with ferrule without plastic sleeve
Connection name
Connection method
Stripping length
Conductor cross section solid
Conductor cross section AWG
Conductor cross section, flexible, with ferrule, with plastic sleeve
Conductor cross section flexible, with ferrule without plastic sleeve
Connection name
Connection method
Stripping length
Conductor cross section solid
Conductor cross section AWG
Conductor cross section, flexible, with ferrule, with plastic sleeve
Conductor cross section flexible, with ferrule without plastic sleeve
Main circuit IN+
Push-in connection
18 mm
0.75 mm² ... 16 mm²
20 ... 4
0.75 mm² ... 10 mm²
0.75 mm² ... 16 mm²
Main circuit IN-
Push-in connection
10 mm
0.2 mm² ... 2.5 mm²
24 ... 12
0.25 mm² ... 1.5 mm²
0.25 mm² ... 2.5 mm²
Main circuit OUT
Push-in connection
10 mm
0.2 mm² ... 2.5 mm²
24 ... 12
0.25 mm² ... 1.5 mm²
0.25 mm² ... 2.5 mm²
11/08/2018 Page 4 / 7
https://www.phoenixcontact.com/pi/products/2905744
Electronic device circuit breaker - CBM E8 24DC/0.5-10A NO-
R - 2905744
Technical data
Standards and Regulations
Standards/specifications
EN 61000-6-2
EN 61000-6-3
EN 60068-2-6
EN 60068-2-11
EN 60068-2-78
Environmental Product Compliance
REACh SVHC
China RoHS
Lead 7439-92-1
Environmentally friendly use period: unlimited = EFUP-e
No hazardous substances above threshold values
Drawings
Diagram
t
s
t
s
2 ... 10 A
100
100
Diagram
1000
1000
0,5 ... 1 A
10
10
1
1
0,1
0,1
0,01
0,5
1,1
1,3
1,5
2
0,01
x I
N
0,5
1,1
1,3
1,5
2
x I
N
Trigger characteristic in the DC range
Trigger characteristic in the DC range
11/08/2018 Page 5 / 7
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