The Hager MCB 3P 6kA B-40A 3M safeguards three-phase circuits against overloads and short circuits. Rated 40A with B-curve tripping, 6kA Icn (IEC 60898-1) and 10kA Icu at 400V (IEC 60947-2), it fits residential and light commercial boards. Compact 3 modules, 400V AC 50/60 Hz, Ui 500V, Uimp 4kV. Screw/bi-connect terminals, IP20, 360° mounting, -25 to +70°C.

EAN

3250614343537

Packaging

Miniature circuit breakers (MCB and MCB Multipolar)

MCB 2P 20A 6kA Curve C, 2 Modules, 400V AC MBN340A

Accessories
Technical properties
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Complete your system

AOB type A-HI 1 products available
Modular phase busbar 3 products available
AOB type AC 1 products available
Protective cap/strip for phase busbar 1 products available

Technical properties

Rated current IN

40 A
Rated short-circuit breaking capacity Icn under 230 V AC according to IEC 60898-1

6 kA
Rated ultimate short-circuit breaking capacity Icu under 400 V AC IEC 60947-2

10 kA
Rated current -15°C

48.4 A
Rated current -10°C

47.5 A
Rated current -5°C

46.6 A
Rated current at 0°C

45.8 A
Rated current 5°C

44.8 A
Rated current 10°C

43.9 A
Rated current 15°C

43 A
Rated current at 20°C

42 A
Rated current 25°C

41 A
Rated current 30°C

40 A
Rated current 35°C

38.8 A
Rated current at 40°C

37.5 A
Rated current at 45°C

36.2 A
Rated current at 50°C

34.8 A
Rated current 55°C

33.4 A
Rated current 60°C

31.9 A
Rated current 65°C

30.3 A
Rated current 70°C

28.6 A

Curve

B

Number of modules

3

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

6 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

4000 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
Cross-section flexible conductor

1 - 25 mm²
Cross-section rigid conductor

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
Air humidity protection

For all climates
Operating temperature

-25 - +70 °C

Power dissipation at IN

16.90 W

Top connection alignment for modular devices

Aligned terminal
Down connection alignment for modular devices

Aligned terminal
Type of connection

Screw terminal

Height

83 mm
Width

52.50 mm
Depth

70 mm

Environmental value

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RoHS conform Yes