MCB 4P 10kA/15kA B-20A 4M NBN420A

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Complete your system

Modular phase busbar 1 products available
Terminal cover 1 products available
AOB type AC/A-SEL 5 products available
AOB type A-HI 3 products available
AOB type AC 6 products available

Technical properties

Rated current

20 A
Rated service breaking capacity Ics under 230 V AC according to IEC 60947-2

15 kA
Rated ultimate short-circuit breaking capacity Icu under 230 V AC IEC 60947-2

30 kA
Rated current -25°C

24.78 A
Rated current at -20°C

24.38 A
Rated current -15°C

23.98 A
Rated current -10°C

23.57 A
Rated current -5°C

23.16 A
Rated current at 0°C

22.73 A
Rated current 5°C

22.30 A
Rated current 10°C

21.86 A
Rated current 15°C

21.41 A
Rated current at 20°C

20.95 A
Rated current 25°C

20.48 A
Rated current 30°C

20 A
Rated current 35°C

19.48 A
Rated current at 40°C

18.94 A
Rated current at 45°C

18.39 A
Rated current at 50°C

17.81 A
Rated current 55°C

17.22 A
Rated current 60°C

16.61 A
Rated current 65°C

15.98 A
Rated current 70°C

15.32 A

Type of pole

4P
Curve

B

Number of modules

4

Rated short-circuit breaking capacity Icn AC according to IEC 60898-1

10 kA

Nominal tightening torque top terminal

2.80 - 2.80 Nm
Nominal tightening torque down terminal

2.80 - 2.80 Nm
Nominal tightening torque

2.80 - 2.80 Nm
Type of bottom connection for modular devices

biconnect
Type of top connection for modular devices

Screw terminal
360° mounting position possible

Yes

Rated operational voltage Ue

400 - 400 V
Type voltage supply

AC
Rated insulation voltage Ui

500 V
Rated impulse withstand voltage Uimp

6000 V

Frequency

50 - 60 Hz

Cross-section of input and output with screws, for massive conductors

1 - 35 mm²
Cross-section of input and output with screws, for flexible conductors

1 - 25 mm²
Cross-section of input with screws, for flexible conductors

1 - 25 mm²
Cross-section of input with screws, for massive conductors

1 - 35 mm²

Ingress Protection (IP) class

IP20

Degree of pollution according to IEC 60664 / IEC 60947-2

2
Class of energy limitation I²t

3
Operating temperature

-25 - 70 °C

Total power loss under IN

10.87 W

Electric endurance in number of cycles

4000
Number of mechanical operations

20000

Type of connection

Screw terminal
Top connection alignment for modular devices

Aligned terminal
Down connection alignment for modular devices

Aligned terminal

Height

83 mm
Width

70 mm
Depth

70 mm

Environmental value

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RoHS conform Yes