The Hager 3P B-curve 20A MCB (3 modules) protects three-phase circuits against overloads and short circuits. Rated 400 V AC, it delivers 10 kA Icn (IEC 60898-1) and up to 15 kA Ics/30 kA Icu (IEC 60947-2) for strong fault clearing. Screw/biconnect terminals accept 1-35 mm²; IP20. Operates -25 to 70°C, 50-60 Hz. Ideal for residential and light commercial boards, with 360° mounting and compact 83×52.5×70 mm size.

EAN

3250614618352

Packaging

Miniature circuit breakers (MCB and MCB Multipolar)

MCB 3P 10A 10kA Curve B 3 Modules 400V AC NBN320A

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Technical properties
Environmental value
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Complete your system

Terminal cover 1 products available
Modular phase busbar 3 products available
AOB type A-HI 1 products available
AOB type AC 3 products available
Protective cap/strip for phase busbar 1 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 AC IEC 60947-2

15 kA
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
Rated service breaking capacity Ics AC according to IEC 60947-2

50 %
Rated service breaking capacity Ics AC according to IEC 60898-1

7.50 kA

Type of pole

3P
Curve

B

Number of modules

3

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
Grid distance

60 mm

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

8.04 W

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

52.50 mm
Depth

70 mm

Environmental value

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RoHS conform Yes